Je crois que j'ai un virus

Mon ordi bogue et mon antivirusva mal aider moi.
Rapport de HijackThis:

Logfile of HijackThis v1.99.1
Scan saved at 4:34:04 PM, on 4/18/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)

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:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
c:\progra~1\intern~1\iexplore.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Common Files\{45D46C11-046F-1033-0510-020310140001}\Update.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Computer\Desktop\HijackThis.exe

O3 - Toolbar: Bar888 - {C1B4DEC2-2623-438e-9CA2-C9043AB28508} - C:\PROGRA~1\COMMON~1\{35D46~1\Bar888.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [kind01] C:\DOCUME~1\Computer\APPLIC~1\SCRHID~1\Bolt grim.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [Hsss] "C:\PROGRA~1\COMMON~1\SSEMBL~1\userinit.exe" -vt yazb
O4 - HKCU\..\Run: [Lcs] "C:\Program Files\?asks\r?ndll.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 - 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: Client IP-IPX - Unknown owner - C:\WINDOWS\system32\svchosts.exe" -e mc-110-12-0000627 (file missing)
O23 - Service: Command Service (cmdService) - Unknown owner - C:\WINDOWS\Q1VTTDItQw\command.exe (file missing)
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe

Bonsoir Wiscas,
relances hisjacthis et coches les cases suisvantes et les fixer:
O3 - Toolbar: Bar888 - {C1B4DEC2-2623-438e-9CA2-C9043AB28508} - C:\PROGRA~1\COMMON~1\{35D46~1\Bar888.dll (Effacer à tout prix ! Bar888.dll - FreeProd/Toolbar888, http://www3.cai.com/securityadvisor/pest /pest.aspx?id=453098901 parasite, a MaxSearch/MaxiFiles, http://www.symantec.com/avcenter/venc/da ta/adware.maxsearch.html adware variant)
O4 - HKCU\..\Run: [kind01] C:\DOCUME~1\Computer\APPLIC~1\SCRHID~1\Bolt grim.exe (Fuzzy Algorithmcheck (2.92 / 5.00), Nasty)
O23 - Service: Client IP-IPX - Unknown owner - C:\WINDOWS\system32\svchosts.exe" -e mc-110-12-0000627 (file missing)
O23 - Service: Command Service (cmdService) - Unknown owner - C:\WINDOWS\Q1VTTDItQw\command.exe (file missing)

et relancer hijackthis et nous remettres le log pour vérification