Sony VPCP11S1E User's Guide

NUser GuidePersonal ComputerVPCP11 Series

10nNGetting Started >Getting StartedThis section describes how to get started using your VAIO computer.❑ Locating Controls and Ports (page 11)❑ Abo

100nNUsing Peripheral Devices >Using the Multiple Monitors FunctionUsing the Multiple Monitors FunctionThe Multiple Monitors function allows you to

101nNUsing Peripheral Devices >Using the Multiple Monitors FunctionTo use the Multiple Monitors function✍Your external display may not support the

102nNUsing Peripheral Devices >Connecting a USB DeviceConnecting a USB DeviceYou can connect a Universal Serial Bus (USB) device, such as a mouse,

103nNUsing Peripheral Devices >Connecting a USB DeviceNotes on connecting a USB device❑ You may need to install the driver software supplied with y

104nNCustomizing Your VAIO Computer >Customizing Your VAIO ComputerThis section briefly describes how to change the main settings of your VAIO comp

105nNCustomizing Your VAIO Computer >Setting the PasswordSetting the PasswordSetting the password allows you to protect your computer from unauthor

106nNCustomizing Your VAIO Computer >Setting the PasswordSetting the Power-on PasswordTo add the power-on password (machine password)1 Turn on the

107nNCustomizing Your VAIO Computer >Setting the PasswordTo add the power-on password (user password)!Make sure you set the machine password before

108nNCustomizing Your VAIO Computer >Setting the PasswordTo change or remove the power-on password (machine password)1 Turn on the computer and pre

109nNCustomizing Your VAIO Computer >Setting the PasswordTo change or remove the power-on password (user password)1 Turn on the computer and press

11nNGetting Started >Locating Controls and PortsLocating Controls and PortsTake a moment to identify the controls and ports shown on the following

110nNCustomizing Your VAIO Computer >Setting the PasswordSetting the Windows PasswordTo add the Windows password1 Click Start and Control Panel.2 C

111nNCustomizing Your VAIO Computer >Setting the PasswordTo remove the Windows password1 Click Start and Control Panel.2 Click User Accounts and Fa

112nNCustomizing Your VAIO Computer >Using Intel(R) VTUsing Intel(R) VTIntel(R) Virtualization Technology (VT) allows you to use hardware virtualiz

113nNCustomizing Your VAIO Computer >Using the VAIO Control CenterUsing the VAIO Control CenterThe VAIO Control Center utility allows you to access

114nNCustomizing Your VAIO Computer >Using the VAIO Power ManagementUsing the VAIO Power ManagementPower management helps you set up power plans fo

115nNPrecautions >PrecautionsThis section describes safety guidelines and precautions to help you protect your VAIO computer from potential damage.

116nNPrecautions >Safety InformationSafety InformationComputer❑ Use your computer on a solid, stable surface.❑ Provide adequate air circulation to

117nNPrecautions >Safety Information❑ If your computer becomes hot, do any of the following:❑ Change the power option. To change the power option,

118nNPrecautions >Safety InformationPower Source❑ Do not place the AC adapter in contact with your skin. Remove the AC adapter away from your body

119nNPrecautions >Safety InformationHeadphones❑ Road safety – Do not use headphones while driving, cycling, or operating any motorized vehicle. It

12nNGetting Started >Locating Controls and PortsA Ambient light sensor (page 164)Measures ambient light intensity for automatically adjusting the L

120nNPrecautions >Care and Maintenance InformationCare and Maintenance InformationComputer❑ Clean the cabinet and the LCD panel with a soft, dry or

121nNPrecautions >Handling Your ComputerHandling Your Computer❑ If you drop a solid object or any liquid onto your computer, shut down the computer

122nNPrecautions >Handling Your Computer❑ If your computer is brought directly from a cold location to a warm one, moisture may condense inside the

123nNPrecautions >Handling Your Computer❑ Do not exert pressure on the LCD screen or its edges when opening the LCD screen lid or lifting your comp

124nNPrecautions >Handling the LCD ScreenHandling the LCD Screen❑ Do not leave the LCD screen facing the sun. This could damage the LCD screen. Be

125nNPrecautions >Using the Power SourceUsing the Power SourceSee the specifications to find out about the configuration of your computer.❑ Do not

126nNPrecautions >Handling the Built-in CameraHandling the Built-in Camera❑ Do not touch the lens protection cover of the built-in camera, as it ma

127nNPrecautions >Handling DiscsHandling Discs❑ Fingerprints and dust on the surface of a disc may cause read errors. Be sure to hold the disc by i

128nNPrecautions >Using the Battery PackUsing the Battery Pack❑ Battery life is shorter in a cold environment. This is due to decreased battery eff

129nNPrecautions >Handling "Memory Stick"Handling "Memory Stick"❑ Do not touch the "Memory Stick" connector with your

13nNGetting Started >Locating Controls and PortsRightA USB port* (page 102)B I/O port (page 93)* Compliant with the USB 2.0 standard and supports h

130nNPrecautions >Handling the Built-in Storage DeviceHandling the Built-in Storage DeviceThe built-in storage device (hard disk drive or solid sta

131nNPrecautions >Handling the Display/LAN AdapterHandling the Display/LAN AdapterTo help you keep the display/LAN adapter at hand, the display/LAN

132nNTroubleshooting >TroubleshootingThis section describes how to solve common problems you might encounter when using your VAIO computer. Many pr

133nNTroubleshooting >❑ Speakers (page 167)❑ Pointing Device (page 169)❑ Keyboard (page 170)❑ Floppy Disks (page 171)❑ Audio/Video (page 172)❑ &quo

134nNTroubleshooting >Computer OperationsComputer OperationsWhat should I do if my computer does not start?❑ Make sure your computer is securely pl

135nNTroubleshooting >Computer OperationsWhat should I do if the green power indicator light turns on but my screen remains blank?❑ Press the Alt+F

136nNTroubleshooting >Computer OperationsWhat should I do if my computer or software stops responding?❑ If your computer stops responding while a s

137nNTroubleshooting >Computer OperationsWhy doesn't my computer enter Sleep or Hibernate mode?Your computer may become unstable if the operat

138nNTroubleshooting >Computer OperationsWhy does the System Properties window display a slower CPU speed than the maximum?This is normal. Because

139nNTroubleshooting >Computer OperationsHow can I change the boot device order?You can use one of the BIOS functions to change the boot device ord

14nNGetting Started >Locating Controls and PortsLeftA Strap hole (page 18)B DC IN port (page 19)C USB port* (page 102)D Headphones jack (page 85),

140nNTroubleshooting >Computer OperationsWhy doesn't my computer respond fast enough while Windows Aero is running?Performance of your compute

141nNTroubleshooting >Computer OperationsWhy doesn't the rotation function work?❑ The rotation function may be disabled. In such a case, enabl

142nNTroubleshooting >System Update / SecuritySystem Update / SecurityHow can I find important updates for my computer?You can find and install the

143nNTroubleshooting >System Update / SecurityHow do I keep my antivirus software updated?You can keep the Internet security software programs curr

144nNTroubleshooting >RecoveryRecoveryHow can I create Recovery Media?You can create Recovery Media using the VAIO Care. The media are used to rest

145nNTroubleshooting >RecoveryHow do I check the volume of the recovery area?Your built-in storage device contains the recovery area where the data

146nNTroubleshooting >RecoveryHow do I reduce the volume of the recovery area?Your built-in storage device contains the recovery area where the dat

147nNTroubleshooting >Battery PackBattery PackHow do I find the battery charging status? You can check the charge indicator for the battery chargin

148nNTroubleshooting >Battery PackCan my computer enter Hibernate mode while running on battery power? Your computer can enter Hibernate mode while

149nNTroubleshooting >Built-in CameraBuilt-in CameraWhy does the viewfinder show no images or poor-quality images?❑ The built-in camera cannot be s

15nNGetting Started >Locating Controls and PortsBack A Battery connector (page 21)B SIM card slot* (page 66)* On models with the wireless WAN funct

150nNTroubleshooting >Built-in CameraWhat should I do if my computer becomes unstable when it enters a power saving mode while the built-in camera

151nNTroubleshooting >Networking (LAN/Wireless LAN)Networking (LAN/Wireless LAN)What should I do if my computer cannot connect to a wireless LAN ac

152nNTroubleshooting >Networking (LAN/Wireless LAN)❑ Make sure Maximum Performance is selected for Wireless Adapter Settings in the Power Options w

153nNTroubleshooting >Networking (LAN/Wireless LAN)What should I do if I cannot access the Internet?❑ Check the access point settings. See the manu

154nNTroubleshooting >Networking (LAN/Wireless LAN)How do I avoid data transfer interruptions?❑ While your computer is connected to an access point

155nNTroubleshooting >Wireless WANWireless WANWhat should I do if my computer cannot connect to the wireless WAN?❑ Make sure the battery pack is in

156nNTroubleshooting >Bluetooth TechnologyBluetooth TechnologyWhat should I do if other Bluetooth devices cannot find my computer?❑ Make sure both

157nNTroubleshooting >Bluetooth TechnologyWhat should I do if other Bluetooth devices cannot connect to my computer?❑ Check the suggestions in What

158nNTroubleshooting >Bluetooth TechnologyCan I use a device with Bluetooth technology on airplanes?With Bluetooth technology, your computer transm

159nNTroubleshooting >Bluetooth TechnologyWhat should I do if I do not hear sound from my headphones or audio/video controller?Check whether your h

16nNGetting Started >About the Indicator LightsAbout the Indicator LightsYour computer is equipped with the following indicator lights: Indicator F

160nNTroubleshooting >Optical DiscsOptical DiscsWhat should I do if my external optical disc drive does not work properly?Make sure that your exter

161nNTroubleshooting >GPSGPSWhat should I do if I cannot use the GPS function?❑ Make sure the WIRELESS switch is on.❑ Make sure the switch next to

162nNTroubleshooting >DisplayDisplayWhy did my screen go blank?❑ Your computer screen may go blank if the computer loses power or enters a power sa

163nNTroubleshooting >DisplayWhat should I do if I do not see proper images or videos?❑ Be sure to select True Color (32 bit) for the display color

164nNTroubleshooting >DisplayWhy doesn't my screen display a video?❑ If the display output is directed to the external display and the externa

165nNTroubleshooting >PrintingPrintingWhat should I do if I cannot print a document?❑ Make sure your printer is on, and the printer cable is secure

166nNTroubleshooting >MicrophoneMicrophoneWhat should I do if my microphone does not work?❑ Your computer is not equipped with the microphone jack.

167nNTroubleshooting >SpeakersSpeakersWhat should I do if I do not hear sound from the built-in speakers?❑ If you are using a program that has its

168nNTroubleshooting >SpeakersWhat should I do if my external speakers do not work?❑ Check the suggestions in What should I do if I do not hear sou

169nNTroubleshooting >Pointing DevicePointing DeviceWhat should I do if my pointing device does not work?❑ You may have disabled the pointing devic

17nNGetting Started >Holding Your ComputerHolding Your ComputerYou can hold your computer in both hands and operate it as illustrated below.!Be sur

170nNTroubleshooting >KeyboardKeyboardWhat should I do if the keyboard configuration is wrong?The language layout of your computer's keyboard

171nNTroubleshooting >Floppy DisksFloppy DisksWhy doesn't the Safely Remove Hardware and Eject Media icon appear on the taskbar when the drive

172nNTroubleshooting >Audio/VideoAudio/VideoHow do I turn off the Windows startup sound?To turn off the Windows startup sound, follow these steps:1

173nNTroubleshooting >Audio/VideoWhat should I do if I do not hear the sound from the sound output device connected to the HDMI output port, optica

174nNTroubleshooting >"Memory Stick""Memory Stick"What should I do if I cannot use "Memory Stick" that was formatted

175nNTroubleshooting >PeripheralsPeripheralsWhat should I do if I cannot connect a USB device?❑ If applicable, check the USB device is turned on an

176nNTrademarks >TrademarksSONY, the SONY logo, VAIO and the VAIO logo are registered trademarks of Sony Corporation."BRAVIA" is a tradem

177nNTrademarks >SD Logo is a trademark.SDHC Logo is a trademark.The ExpressCard word mark and logos are owned by the PCMCIA and any use of such ma

178nNNotice >Notice© 2010 Sony Corporation. All rights reserved.This manual and the software described herein, in whole or in part, may not be repr

© 2010 Sony Corporationn

18nNGetting Started >Holding Your ComputerAttaching the Hand StrapTo prevent accidental dropping, be sure to fasten the supplied hand strap to your

19nNGetting Started >Connecting a Power SourceConnecting a Power SourceYou can use either an AC adapter or a rechargeable battery pack for supplyin

2nNContentsBefore Use... 4Finding More about Your VAIO Computer ...

20nNGetting Started >Connecting a Power Source✍To disconnect your computer completely from an AC power source, unplug the AC adapter from the AC ou

21nNGetting Started >Using the Battery PackUsing the Battery PackThe battery pack is already installed on your computer at the time of delivery but

22nNGetting Started >Using the Battery Pack3 Fit the battery pack into the battery compartment.The battery pack should be level with the bottom of

23nNGetting Started >Using the Battery PackTo remove the battery pack!You will lose all unsaved data if you remove the battery pack while your comp

24nNGetting Started >Using the Battery Pack4 Hold the battery pack with your fingertips as illustrated below, lift it in the direction of the arrow

25nNGetting Started >Using the Battery PackCharging the Battery PackThe battery pack supplied with your computer is not fully charged at the time o

26nNGetting Started >Using the Battery Pack✍Keep the battery pack in your computer while it is directly connected to an AC power source. The batter

27nNGetting Started >Using the Battery PackChecking the Battery Charge CapacityThe battery charge capacity gradually decreases as the number of bat

28nNGetting Started >Using the Battery PackExtending the Battery LifeWhen your computer is running on battery power, you can extend the battery lif

29nNGetting Started >Shutting Down Your Computer SafelyShutting Down Your Computer SafelyTo avoid losing unsaved data, be sure to shut down your co

3nNPrecautions... 115Safety Information ...

30nNGetting Started >Using the Power Saving ModesUsing the Power Saving ModesYou can take advantage of the power management settings to conserve ba

31nNGetting Started >Using the Power Saving ModesUsing Sleep ModeTo activate Sleep modeClick Start, the arrow next to the Shut down button, and S

32nNGetting Started >Keeping Your Computer in Optimum ConditionKeeping Your Computer in Optimum ConditionUpdating Your ComputerBe sure to update yo

33nNGetting Started >Keeping Your Computer in Optimum ConditionUsing the VAIO CareWith the VAIO Care, you can regularly conduct performance checks

34nNUsing Your VAIO Computer >Using Your VAIO ComputerThis section describes how to get the most out of using your VAIO computer.❑ Using the Keyboa

35nNUsing Your VAIO Computer >Using the KeyboardUsing the KeyboardYour keyboard has additional keys that perform model-specific tasks.Combinations

36nNUsing Your VAIO Computer >Using the Keyboard Fn + / (F9/F10): zoomingChanges the size of an image or a document displayed on some software.T

37nNUsing Your VAIO Computer >Using the Pointing DeviceUsing the Pointing DeviceYour computer is equipped with two types of cursor-pointing devices

38nNUsing Your VAIO Computer >Using the Pointing DeviceUsing the Pointing StickThe keyboard contains the pointing stick (1). You can point to, sele

39nNUsing Your VAIO Computer >Using the Pointing Device✍The pointer may move on its own on rare occasions, which does not indicate a malfunction. L

4nNBefore Use >Before UseCongratulations on your purchase of this Sony VAIO® computer and welcome to the on-screen User Guide. Sony has combined le

40nNUsing Your VAIO Computer >Using the Pointing DeviceUsing the Touch PadThe touch pad (1) is located at the lower-right corner of the LCD screen.

41nNUsing Your VAIO Computer >Using Special-function ButtonsUsing Special-function ButtonsYour computer is equipped with special buttons to help yo

42nNUsing Your VAIO Computer >Using Special-function Buttons WEB button While the computer is in Normal mode, the WEB button launches the web brows

43nNUsing Your VAIO Computer >Using the Quick Web Access FunctionUsing the Quick Web Access FunctionThe Quick Web Access function enables you immed

44nNUsing Your VAIO Computer >Using the Quick Web Access FunctionNotes on Using the Quick Web Access FunctionWhile the Quick Web Access function is

45nNUsing Your VAIO Computer >Using the Built-in CameraUsing the Built-in CameraYour computer is equipped with a built-in MOTION EYE camera.With th

46nNUsing Your VAIO Computer >Using "Memory Stick"Using "Memory Stick""Memory Stick" is a compact, portable, and vers

47nNUsing Your VAIO Computer >Using "Memory Stick"Inserting and Removing "Memory Stick"To insert "Memory Stick"!Your

48nNUsing Your VAIO Computer >Using "Memory Stick"5 Carefully slide "Memory Stick" into the slot until it clicks into place.Do

49nNUsing Your VAIO Computer >Using "Memory Stick"!Before using "Memory Stick Micro" ("M2"), be sure to insert it int

5nNBefore Use >Finding More about Your VAIO ComputerFinding More about Your VAIO ComputerThis section provides support information about your VAIO

50nNUsing Your VAIO Computer >Using "Memory Stick"To remove "Memory Stick"!Do not remove "Memory Stick" while the Med

51nNUsing Your VAIO Computer >Using "Memory Stick"Formatting "Memory Stick"To format "Memory Stick""Memory Stick

52nNUsing Your VAIO Computer >Using "Memory Stick"6 Click Start.7 Follow the on-screen instructions.!It may take time to format "Mem

53nNUsing Your VAIO Computer >Using "Memory Stick"Notes on Using "Memory Stick"❑ Your computer has been tested and found compat

54nNUsing Your VAIO Computer >Using Other Modules / Memory CardsUsing Other Modules / Memory CardsUsing the SD Memory CardYour computer is equipped

55nNUsing Your VAIO Computer >Using Other Modules / Memory CardsTo insert an SD memory card!Your computer is supplied with a slot protector in the

56nNUsing Your VAIO Computer >Using Other Modules / Memory Cards✍When you insert the SD memory card into the slot for the first time, you may be pr

57nNUsing Your VAIO Computer >Using Other Modules / Memory CardsTo remove an SD memory card!Insert the SD memory card slot protector to block any p

58nNUsing Your VAIO Computer >Using Other Modules / Memory CardsNotes on Using Memory CardsGeneral notes on using the memory card❑ Be sure to use m

59nNUsing Your VAIO Computer >Using the InternetUsing the InternetBefore using the Internet, you need to sign up with an Internet Service Provider

6nNBefore Use >Finding More about Your VAIO Computer2. On-screen Documentation❑ User Guide (This manual) — Features of your computer and informatio

60nNUsing Your VAIO Computer >Using the Network (LAN)Using the Network (LAN)You need the display/LAN adapter to connect your computer to 1000BASE-T

61nNUsing Your VAIO Computer >Using the Wireless LANUsing the Wireless LANThe Wireless LAN (WLAN) allows your computer to connect to a network thro

62nNUsing Your VAIO Computer >Using the Wireless LANNotes on Using the Wireless LAN FunctionGeneral notes on using the wireless LAN function❑ In so

63nNUsing Your VAIO Computer >Using the Wireless LANNote on the data encryptionThe WLAN standard includes the encryption methods: Wired Equivalent

64nNUsing Your VAIO Computer >Using the Wireless LANStarting Wireless LAN CommunicationsYou first need to establish wireless LAN communications bet

65nNUsing Your VAIO Computer >Using the Wireless LANStopping Wireless LAN CommunicationsTo stop wireless LAN communicationsClick the switch next to

66nNUsing Your VAIO Computer >Using the Wireless WANUsing the Wireless WANUsing the wireless WAN (WWAN) allows your computer to connect to the Inte

67nNUsing Your VAIO Computer >Using the Wireless WANInserting a SIM CardTo use the wireless WAN function, you first need to insert a SIM card into

68nNUsing Your VAIO Computer >Using the Wireless WAN4 Insert the SIM card into the SIM card slot with its printed circuit side up.!Do not touch the

69nNUsing Your VAIO Computer >Using the Wireless WANStarting the Wireless WAN CommunicationsTo start the wireless WAN communications1 Turn on the W

7nNBefore Use >Finding More about Your VAIO Computer3. Support Web SitesIf you have any problem with the computer, visit the VAIO-Link web site at

70nNUsing Your VAIO Computer >Using the Bluetooth FunctionUsing the Bluetooth FunctionYou can establish wireless communications between your comput

71nNUsing Your VAIO Computer >Using the Bluetooth FunctionCommunicating with Another Bluetooth DeviceYou can connect your computer to a Bluetooth d

72nNUsing Your VAIO Computer >Using the Bluetooth FunctionTo communicate with another Bluetooth deviceTo communicate with another Bluetooth device,

73nNUsing Your VAIO Computer >Using the Bluetooth FunctionStopping Bluetooth CommunicationsTo stop Bluetooth communications1 Turn off the Bluetooth

74nNUsing Your VAIO Computer >Using the Bluetooth FunctionNotes on Using the Bluetooth Function❑ The data transfer rate varies, depending on the fo

75nNUsing Your VAIO Computer >Using the Bluetooth Function❑ The Bluetooth function may not work with other devices, depending on the manufacturer o

76nNUsing Your VAIO Computer >Using the GPS FunctionUsing the GPS FunctionYou can get the location information by using GPS (Global Positioning Sys

77nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsUsing Various Functions with Built-in SensorsWith a built-in acceleromet

78nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsUsing Viewing Functions with a Built-in AccelerometerTo use the rotation

79nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsTo use the flick functionWith the flick function, you can go backward or

8nNBefore Use >Ergonomic ConsiderationsErgonomic ConsiderationsYou will be using your computer as a portable device in a variety of environments. W

80nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsTo use the flick function while you are using the computer in vertical o

81nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsObtaining Location Information with a Built-in Digital CompassWith a bui

82nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsNotes on the Built-in SensorsNotes on using the built-in accelerometer❑

83nNUsing Your VAIO Computer >Using Various Functions with Built-in SensorsNotes on using the built-in digital compass❑ The digital compass on the

84nNUsing Peripheral Devices >Using Peripheral DevicesYou can add functionality to your VAIO computer by using the various ports on the computer.❑

85nNUsing Peripheral Devices >Using the Noise Canceling HeadphonesUsing the Noise Canceling HeadphonesA pair of noise canceling headphones may be s

86nNUsing Peripheral Devices >Using the Noise Canceling HeadphonesBefore You Use the Noise Canceling Headphones❑ You can enable the noise canceling

87nNUsing Peripheral Devices >Using the Noise Canceling Headphones❑ When the noise canceling function does not seem to be working, unplug the suppl

88nNUsing Peripheral Devices >Using the Noise Canceling HeadphonesConnecting the Noise Canceling HeadphonesTo connect the noise canceling headphone

89nNUsing Peripheral Devices >Using the Noise Canceling HeadphonesAdjusting the Effect of the Noise Canceling FunctionThe noise canceling headphone

9nNBefore Use >Ergonomic Considerations❑ Viewing angle of the computer display – Use the display tilting feature to find the best position. You can

90nNUsing Peripheral Devices >Using the Noise Canceling HeadphonesUsing the microphone directivity functionJust like an ordinary microphone, the bu

91nNUsing Peripheral Devices >Using the Noise Canceling HeadphonesWhat to do if the icon and the balloon do not appearWhen the noise canceling func

92nNUsing Peripheral Devices >Connecting a Display/LAN AdapterConnecting a Display/LAN AdapterA display/LAN adapter may be supplied with your compu

93nNUsing Peripheral Devices >Connecting a Display/LAN AdapterConnecting the Display/LAN adapter to Your ComputerTo connect the display/LAN adapter

94nNUsing Peripheral Devices >Connecting an Optical Disc DriveConnecting an Optical Disc DriveTo use optical disc media with your computer, connect

95nNUsing Peripheral Devices >Connecting an Optical Disc DriveTo connect an optical disc drive1 Connect your external optical disc drive to an AC o

96nNUsing Peripheral Devices >Connecting External Speakers or HeadphonesConnecting External Speakers or HeadphonesYou can connect external sound ou

97nNUsing Peripheral Devices >Connecting an External DisplayConnecting an External DisplayYou can connect an external display (not supplied) to you

98nNUsing Peripheral Devices >Connecting an External DisplayConnecting a Computer Display or a ProjectorYou need a display/LAN adapter to connect a

99nNUsing Peripheral Devices >Selecting Display ModesSelecting Display ModesWhen an external display is connected, you can select either your compu