Virus ou carte graphique defectueuse ?

Bonjour,

Mon ordi met un temps fou à démarrer et se plante régulièrement (écran noir ou des couleurs bizarres ) .je pense à une carte graphique défectueuse ou un virus .
quelqu'un pourrait il regarder mon hijacthis pour me conseiller .
merci
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:29:58, on 10/07/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

Running processes:
C:\WINDOWSS\System32\smss.exe
C:\WINDOWSS\system32\winlogon.exe
C:\WINDOWSS\system32\services.exe
C:\WINDOWSS\system32\lsass.exe
C:\WINDOWSS\system32\svchost.exe
C:\WINDOWSS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
C:\WINDOWSS\Explorer.EXE
C:\PROGRA~1\ALWILS~1\Avast5\avastUI.exe
C:\WINDOWSS\system32\ctfmon.exe
C:\Program Files\NETGEAR WG311v2 Adapter\wlancfg5.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hposol08.exe
C:\WINDOWSS\system32\rundll32.exe
C:\WINDOWSS\system32\spoolsv.exe
c:\program files\a-squared free\a2service.exe
C:\WINDOWSS\system32\svchost.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Google\Update\GoogleUpdate.exe
C:\WINDOWSS\System32\svchost.exe
C:\WINDOWSS\system32\nvsvc32.exe
C:\WINDOWSS\System32\svchost.exe
C:\Program Files\Sunbelt Software\Personal Firewall\SbPFLnch.exe
C:\Program Files\Sunbelt Software\Personal Firewall\SbPFSvc.exe
C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
C:\WINDOWSS\System32\svchost.exe
C:\Program Files\Sunbelt Software\Personal Firewall\SbPFCl.exe
C:\WINDOWSS\System32\wbem\wmiapsrv.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: HP Print Enhancer - {0347C33E-8762-4905-BF09-768834316C61} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_printenhancer.dll
O2 - BHO: HP Print Clips - {053F9267-DC04-4294-A72C-58F732D338C0} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_framework.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWSS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [avast5] C:\PROGRA~1\ALWILS~1\Avast5\avastUI.exe /nogui
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Fichiers communs\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWSS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWSS\system32\ctfmon.exe
O4 - Global Startup: NETGEAR WG311v2 Smart Configuration.lnk = C:\Program Files\NETGEAR WG311v2 Adapter\wlancfg5.exe
O4 - Global Startup: officejet 6100.lnk = ?
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\WINDOWSS\system32\GPhotos.scr/200
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Livre de reliures HP - {58ECB495-38F0-49cb-A538-10282ABF65E7} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_extensions.dll
O9 - Extra button: Sélection intelligente HP - {700259D7-1666-479a-93B1-3250410481E8} - C:\Program Files\Hewlett-Packard\Smart Web Printing\hpswp_extensions.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O23 - Service: a-squared Free Service (a2free) - Emsi Software GmbH - c:\program files\a-squared free\a2service.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Mail Scanner - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Web Scanner - AVAST Software - C:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Service de l'iPod (iPod Service) - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Ma-Config Service (maconfservice) - CybelSoft - C:\Program Files\ma-config.com\maconfservice.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWSS\system32\nvsvc32.exe
O23 - Service: SbPF.Launcher - Sunbelt Software, Inc. - C:\Program Files\Sunbelt Software\Personal Firewall\SbPFLnch.exe
O23 - Service: Sunbelt Personal Firewall 4 (SPF4) - Sunbelt Software, Inc. - C:\Program Files\Sunbelt Software\Personal Firewall\SbPFSvc.exe
O23 - Service: StarWind iSCSI Service (StarWindService) - Rocket Division Software - C:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe