Un virus ? + log hijackthis

Bonjour,

Mon pc plante souvet récemment et je me demande si ce n'est pas à cause d'un virus (à chaque fois que je fais un scan, ça plante).
Merci d'avance pour votre aide
:)

Logfile of HijackThis v1.99.1
Scan saved at 15:59:29, on 01/04/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Webroot\Spy Sweeper\WRSSSDK.exe
C:\WINDOWS\Explorer.EXE
C:\Documents and Settings\nadège\Mes documents\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.paxbctthlrzilrzwclf.net/Hz_LPw9K2/uF2La_gXQvFuHBZDCehSYGLG5b5b90_5E.cgi
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?redirfallthru=http%3a%2f%2fwww.msn.fr%2fhotmail%2f%3f
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Wanadoo
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Search Class - {08C06D61-F1F3-4799-86F8-BE1A89362C85} - C:\PROGRA~1\Wanadoo\SEARCH~1.DLL
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar3.dll
O2 - BHO: Barre d'outils MSN Search Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Barre d'outils MSN Search - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar3.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [ATIPTA] C:\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [PCMService] "c:\Apps\Powercinema\PCMService.exe"
O4 - HKLM\..\Run: [ACTIVBOARD] c:\apps\ABoard\ABoard.exe
O4 - HKLM\..\Run: [SSC_UserPrompt] C:\Program Files\Fichiers communs\Symantec Shared\Security Center\UsrPrmpt.exe
O4 - HKLM\..\Run: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 - HKLM\..\Run: [OpwareSE2] "C:\Program Files\ScanSoft\OmniPageSE2.0\OpwareSE2.exe"
O4 - HKLM\..\Run: [OPSE reminder] "C:\Program Files\ScanSoft\OmniPageSE2.0\EregFre\Ereg.exe" -r "C:\Program Files\ScanSoft\OmniPageSE2.0\EregFre\ereg.ini"
O4 - HKLM\..\Run: [ToUcamVProperty] C:\PROGRA~1\PHILIP~1\VProperty.exe
O4 - HKLM\..\Run: [WOOWATCH] C:\PROGRA~1\Wanadoo\Watch.exe
O4 - HKLM\..\Run: [WOOTASKBARICON] C:\PROGRA~1\Wanadoo\GestMaj.exe TaskBarIcon.exe
O4 - HKLM\..\Run: [SpySweeper] "C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe" /startintray
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [WOOKIT] C:\PROGRA~1\Wanadoo\Shell.exe appLaunchClientZone.shl|DEFAULT=cnx|PARAM=
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [Veoh] "C:\Program Files\Veoh Networks\Veoh\VeohClient.exe" /VeohHide
O4 - Global Startup: Acrobat Assistant.lnk = C:\Program Files\Adobe\Acrobat 5.0\Distillr\AcroTray.exe
O4 - Global Startup: Iomega Backup Scheduler.lnk = C:\Program Files\Iomega\Iomega Backup\dtiom98.exe
O4 - Global Startup: Iomega Icons.lnk = C:\Program Files\Iomega\Tools\IMGICON.EXE
O4 - Global Startup: IomegaWare.lnk = C:\Program Files\Iomega\Iomegaware\COMMANDER.EXE
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\microsoft office\Office\OSA9.EXE
O4 - Global Startup: Options de démarrage Iomega.lnk = C:\Program Files\Iomega\Tools\IMGSTART.EXE
O4 - Global Startup: QuikSync.lnk = C:\Program Files\Iomega\QuikSync\QUIKSYNC.EXE
O4 - Global Startup: Windows Desktop Search.lnk = C:\Program Files\MSN Toolbar Suite\DS\02.05.0001.1119\fr-fr\bin\WindowsSearch.exe
O8 - Extra context menu item: &MSN Search - res://C:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll/search.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Ouvrir dans un nouvel onglet d'arrière-plan - res://C:\Program Files\MSN Toolbar Suite\TAB\02.05.0000.1105\fr-fr\msntabres.dll/229?daf4f55af96748889051b7c268c22def
O8 - Extra context menu item: Ouvrir dans un nouvel onglet de premier plan - res://C:\Program Files\MSN Toolbar Suite\TAB\02.05.0000.1105\fr-fr\msntabres.dll/230?daf4f55af96748889051b7c268c22def
O8 - Extra context menu item: Ouvrir l'image dans &Microsoft PhotoDraw - res://C:\PROGRA~1\MICROS~3\Office\1036\phdintl.dll/phdContext.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.dll
O9 - Extra button: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\WANADO~1\Wanadoo Messager.exe
O9 - Extra 'Tools' menuitem: Messager Wanadoo - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\PROGRA~1\WANADO~1\Wanadoo Messager.exe
O9 - Extra button: Wanadoo - {1462651F-F4BA-4C76-A001-C4284D0FE16E} - https://www.orange.fr/portail (file missing) (HKCU)
O14 - IERESET.INF: START_PAGE_URL=file://C:\APPS\IE\offline\fr.htm
O16 - DPF: {072039AB-2117-4ED5-A85F-9B9EB903E021} (NowStarter Control) - http://www.clubbox.co.kr/neo.fld/NowStarter.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by103fd.bay103.hotmail.msn.com/resources/MsnPUpld.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDownloader.cab
O16 - DPF: {B64F4A7C-97C9-11DA-8BDE-F66BAD1E3F3A} - https://www.afternic.com/domains/errorsafe.com
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O20 - Winlogon Notify: WRNotifier - C:\WINDOWS\SYSTEM32\WRLogonNTF.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: AOL Connectivity Service (AOL ACS) - America Online, Inc. - C:\PROGRA~1\FICHIE~1\AOL\ACS\AOLacsd.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: ewido security suite control - ewido networks - C:\Program Files\ewido anti-malware\ewidoctrl.exe
O23 - Service: France Telecom Routing Table Service (FTRTSVC) - France Telecom - C:\WINDOWS\System32\FTRTSVC.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: MysqlInventime - Unknown owner - c:\mysql\bin\mysqld-nt.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: Webroot Spy Sweeper Engine (svcWRSSSDK) - Webroot Software, Inc. - C:\Program Files\Webroot\Spy Sweeper\WRSSSDK.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\Security Center\SymWSC.exe
O23 - Service: ZipToA - Iomega Corporation - C:\WINDOWS\system32\ZipToA.exe