J'ai un virus

Bonjour,
j'ai un probleme, sur mon pc j'ai un virus: un vers.
j'ai fait marcher mon Hijackthis il me donne :

Running processes:
C:\WINDOWS\system32\csrss.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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\System32\alg.exe
C:\Program Files\ScanSoft\OmniPageSE2.0\OpwareSE2.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Fichiers communs\Microsoft Shared\Works Shared\WkUFind.exe
C:\Program Files\Logitech\Video\LogiTray.exe
C:\Program Files\Ulead Systems\Ulead Photo Explorer 8.0 SE Basic\Monitor.exe
C:\Program Files\Ulead Systems\Ulead Photo Express 5 SE\calcheck.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\system32\bgsmsnd.exe
C:\Program Files\QuickTime\QTTask.exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\Logitech\Video\FxSvr2.exe
C:\WINDOWS\system32\ctfmon.exe
C:\program files\steam\steam.exe
C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SEPCSuite.exe
C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe
C:\Program Files\TomTom HOME 2\HOMERunner.exe
C:\Program Files\Samsung\Digimax Viewer 2.1\STImgBrowser.exe
C:\Program Files\OpenOffice.org 3\program\soffice.exe
C:\Program Files\OpenOffice.org 3\program\soffice.bin
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\TEMP\tempo-BED.tmp
C:\Program Files\AxBx\Multi Virus Cleaner 2008\MVC.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\System32\wbem\wmiprvse.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.free.fr/freebox/index.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://fr.yahoo.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://fr.yahoo.com/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Windows Internet Explorer fourni par Yahoo! France
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: Yahoo! Companion BHO - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\ycomp5_6_0_1.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {549B5CA7-4A86-11D7-A4DF-000874180BB3} - (no file)
O2 - BHO: pdfMachine - {56CF4856-ECB4-4e46-A897-A378821F97B9} - C:\WINDOWS\system32\bgstb.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: BHO pour Compagnon Web Encarta - {955BE0B8-BC85-4CAF-856E-8E0D8B610560} - C:\Program Files\Fichiers communs\Microsoft Shared\Encarta Web Companion\2007\ENCWCBAR.DLL
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
O3 - Toolbar: &Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\ycomp5_6_0_1.dll
O3 - Toolbar: Easy-WebPrint - {327C2873-E90D-4c37-AA9D-10AC9BABA46C} - C:\Program Files\Canon\Easy-WebPrint\Toolband.dll
O3 - Toolbar: Compagnon Web Encarta - {147D6308-0614-4112-89B1-31402F9B82C4} - C:\Program Files\Fichiers communs\Microsoft Shared\Encarta Web Companion\2007\ENCWCBAR.DLL
O3 - Toolbar: pdfMachine - {56CF4856-ECB4-4e46-A897-A378821F97B9} - C:\WINDOWS\system32\bgstb.dll
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [JMB36X IDE Setup] C:\WINDOWS\JM\JMInsIDE.exe
O4 - HKLM\..\Run: [36X Raid Configurer] C:\WINDOWS\system32\JMRaidSetup.exe boot
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: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Program Files\Fichiers communs\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [Ulead AutoDetector] C:\Program Files\Ulead Systems\Ulead Photo Explorer 8.0 SE Basic\Monitor.exe
O4 - HKLM\..\Run: [Controleur de calendrier pour Ulead Photo Express] C:\Program Files\Ulead Systems\Ulead Photo Express 5 SE\calcheck.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [bgsmsnd.exe] C:\WINDOWS\system32\bgsmsnd.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [C:\WINDOWS\system32\kddtv.exe] C:\WINDOWS\system32\kddtv.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Steam] "c:\program files\steam\steam.exe" -silent
O4 - HKCU\..\Run: [Sony Ericsson PC Suite] "C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SEPCSuite.exe" /systray /nologon
O4 - HKCU\..\Run: [MoneyAgent] "C:\Program Files\Microsoft Money\System\mnyexpr.exe"
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [TomTomHOME.exe] "C:\Program Files\TomTom HOME 2\HOMERunner.exe"
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O4 - Startup: OpenOffice.org 3.0.lnk = C:\Program Files\OpenOffice.org 3\program\quickstart.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Digimax Viewer 2.1.lnk = ?
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Easy-WebPrint Ajouter à la liste d'impressions - res://C:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_AddToList.html
O8 - Extra context menu item: Easy-WebPrint Impression rapide - res://C:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_HSPrint.html
O8 - Extra context menu item: Easy-WebPrint Imprimer - res://C:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_Print.html
O8 - Extra context menu item: Easy-WebPrint Prévisualiser - res://C:\Program Files\Canon\Easy-WebPrint\Resource.dll/RC_Preview.html
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Barre de recherche Encarta - {B205A35E-1FC4-4CE3-818B-899DBBB3388C} - C:\Program Files\Fichiers communs\Microsoft Shared\Encarta Search Bar\ENCSBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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
O17 - HKLM\System\CCS\Services\Tcpip\..\{CEBC6746-A92F-4FE2-B666-11331F618B24}: NameServer = 85.255.112.74;85.255.112.191
O17 - HKLM\System\CCS\Services\Tcpip\..\{F0A8670E-A2BA-46C5-8B51-D79574A4A64E}: NameServer = 85.255.112.74;85.255.112.191
O23 - Service: Adobe LM Service - Unknown owner - C:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe