virus? (arret, probleme sur internet, pb pour se connecter) Merci

Bonjour

Merci de m'aider si vous pouvez.

Mon ordinateur s'arrette seul (j'ai un compte a rebour de 30 secondes que je ne peux interrompre)
ou bien je ne peux plus acceder certaines page web
ou bien je ne peux plus me connecter quand je le demarre (= me logger a windows)

J'ai fait tourner hijackthis; voila le log,

merci beaucoup pour votre aide


Logfile of HijackThis v1.99.1
Scan saved at 21:06:41, on 20/03/2006
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
F:\WINNT\System32\smss.exe
F:\WINNT\system32\winlogon.exe
F:\WINNT\system32\services.exe
F:\WINNT\system32\lsass.exe
F:\WINNT\system32\svchost.exe
F:\WINNT\system32\spoolsv.exe
F:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
F:\Program Files\Alwil Software\Avast4\ashServ.exe
F:\WINNT\System32\svchost.exe
F:\WINNT\system32\MSTask.exe
F:\WINNT\win32ssr.exe
F:\WINNT\System32\WBEM\WinMgmt.exe
F:\WINNT\system32\svchost.exe
F:\WINNT\Explorer.EXE
F:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
F:\Program Files\Alwil Software\Avast4\ashWebSv.exe
F:\WINNT\system32\cmd.exe
F:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
F:\WINNT\system32\internat.exe
F:\Program Files\MSN Messenger\MsnMsgr.Exe
F:\WINNT\system32\spread.exe
F:\Program Files\OpenOffice.org 2.0\program\soffice.exe
F:\Program Files\OpenOffice.org 2.0\program\soffice.BIN
F:\Program Files\Internet Explorer\iexplore.exe
F:\Documents and Settings\Andrew-Sabine\Mes documents\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://home.neuf.fr
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - F:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - F:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - F:\Program Files\MSN Apps\ST\01.03.0000.1005\en-xu\stmain.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - F:\Program Files\MSN Apps\MSN Toolbar\01.02.5000.1021\en-au\msntb.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - F:\WINNT\System32\msdxm.ocx
O3 - Toolbar: ninemsn - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - F:\Program Files\MSN Apps\MSN Toolbar\01.02.5000.1021\en-au\msntb.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [NeroFilterCheck] F:\WINNT\system32\NeroCheck.exe
O4 - HKLM\..\Run: [avast!] F:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [winsystems25] spread.exe
O4 - HKLM\..\RunServices: [winsystems25] spread.exe
O4 - HKCU\..\Run: [internat.exe] internat.exe
O4 - HKCU\..\Run: [MsnMsgr] "F:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - Startup: OpenOffice.org 2.0.lnk = F:\Program Files\OpenOffice.org 2.0\program\quickstart.exe
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = F:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/MsnMessengerSetupDown...
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - F:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - F:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - F:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - F:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: Service d'administration du Gestionnaire de disque logique (dmadmin) - VERITAS Software Corp. - F:\WINNT\System32\dmadmin.exe
O23 - Service: Win32Sr - Unknown owner - F:\WINNT\win32ssr.exe