Bonjour, comme Yvan75, mon PC reboot seul. J'ai donc suivi tes conseils et utilisé HijackThis et voici le rapport. J'espere que tu pourras m'aider.

Logfile of HijackThis v1.99.1
Scan saved at 19:16:44, on 28/10/2005
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:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Norton AntiVirus\navapsvc.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Fichiers communs\Symantec Shared\Security Center\SymWSC.exe
C:\WINDOWS\SYSTEM32\USRmlnkA.exe
C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe
C:\Program Files\Fichiers communs\CMEII\CMESys.exe
C:\Program Files\Roxio\Easy CD Creator 5\DirectCD\DirectCD.exe
C:\PROGRA~1\MYWEBS~1\bar\1.bin\mwsoemon.exe
C:\Program Files\Symantec\LiveUpdate\ALUNOTIFY.EXE
C:\Program Files\Thomson\Lyra Jukebox\LyraHDTrayApp\LYRAHD2TrayApp.exe
C:\Program Files\Musicmatch\Musicmatch Jukebox\mm_tray.exe
C:\Program Files\Musicmatch\Musicmatch Jukebox\mmtask.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\WINDOWS\system32\rundll32.exe
C:\Program Files\Microsoft Money\System\mnyexpr.exe
C:\program files\mailskinner\mailskinner.exe
C:\Program Files\Fichiers communs\GMT\GMT.exe
C:\WINDOWS\SYSTEM32\USRshutA.exe
C:\WINDOWS\SYSTEM32\USRmlnkA.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.fr/0SEFRFR/SAOS02
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.ftpk.net/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer fourni par NC NUMERICABLE
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: (no name) - {008DB894-99ED-445D-8547-0E7C9808898D} - C:\WINDOWS\mslagent\4b_1,0,1,2_mslagent.dll
O2 - BHO: MyWebSearch Search Assistant BHO - {00A6FAF1-072E-44cf-8957-5838F569A31D} - C:\Program Files\MyWebSearch\SrchAstt\1.bin\MWSSRCAS.DLL
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: mwsBar BHO - {07B18EA1-A523-4961-B6BB-170DE4475CCA} - C:\Program Files\MyWebSearch\bar\1.bin\MWSBAR.DLL
O2 - BHO: (no name) - {549B5CA7-4A86-11D7-A4DF-000874180BB3} - (no file)
O2 - BHO: ST - {9394EDE7-C8B5-483E-8773-474BF36AF6E4} - C:\Program Files\MSN Apps\ST\01.03.0000.1005\en-xu\stmain.dll
O2 - BHO: MSNToolBandBHO - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\fr\msntb.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: My &Web Search - {07B18EA9-A523-4961-B6BB-170DE4475CCA} - C:\Program Files\MyWebSearch\bar\1.bin\MWSBAR.DLL
O3 - Toolbar: MSN - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Apps\MSN Toolbar\01.02.4000.1001\fr\msntb.dll
O4 - HKLM\..\Run: [USRpdA] C:\WINDOWS\SYSTEM32\USRmlnkA.exe RunServices \Device\3cpipe-USRpdA
O4 - HKLM\..\Run: [websx] C:\Program Files\websx\int114844.exe -auto
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [ccRegVfy] "C:\Program Files\Fichiers communs\Symantec Shared\ccRegVfy.exe"
O4 - HKLM\..\Run: [CMESys] "C:\Program Files\Fichiers communs\CMEII\CMESys.exe"
O4 - HKLM\..\Run: [AdaptecDirectCD] "C:\Program Files\Roxio\Easy CD Creator 5\DirectCD\DirectCD.exe"
O4 - HKLM\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\bar\1.bin\mwsoemon.exe
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [ALUAlert] C:\Program Files\Symantec\LiveUpdate\ALUNOTIFY.EXE
O4 - HKLM\..\Run: [LyraHD2TrayApp] "C:\Program Files\Thomson\Lyra Jukebox\LyraHDTrayApp\LYRAHD2TrayApp.exe"
O4 - HKLM\..\Run: [MMTray] "C:\Program Files\Musicmatch\Musicmatch Jukebox\mm_tray.exe"
O4 - HKLM\..\Run: [mmtask] "C:\Program Files\Musicmatch\Musicmatch Jukebox\mmtask.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: [Instant Access] rundll32.exe EGDACCESS_1068.dll,InstantAccess
O4 - HKCU\..\Run: [MoneyAgent] "C:\Program Files\Microsoft Money\System\mnyexpr.exe"
O4 - HKCU\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\bar\1.bin\mwsoemon.exe
O4 - HKCU\..\Run: [MailSkinner] c:\program files\mailskinner\mailskinner.exe
O4 - HKCU\..\Run: [eMuleAutoStart] C:\Program Files\eMule\emule.exe -AutoStart
O4 - Startup: MyWebSearch Email Plugin.lnk = C:\Program Files\MyWebSearch\bar\1.bin\MWSOEMON.EXE
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: GStartup.lnk = C:\Program Files\Fichiers communs\GMT\GMT.exe
O4 - Global Startup: InterVideo WinCinema Manager.lnk = C:\Program Files\BenQ\Common\Bin\WinCinemaMgr.exe
O4 - Global Startup: MyWebSearch Email Plugin.lnk = C:\Program Files\MyWebSearch\bar\1.bin\MWSOEMON.EXE
O8 - Extra context menu item: &Search - http://bar.mywebsearch.com/menusearch.html?p=ZSXXXXXXXXUS
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: {01BE5BD7-B2DD-48B3-A759-59265A91E787} - http://akamai.downloadv3.com/binaries/EGDAccess/EGDACCESS_1064_XP.cab
O16 - DPF: {1D4DB7D2-6EC9-47A3-BD87-1E41684E07BB} - http://ak.imgfarm.com/images/nocache/funwebproducts/ei/SmileyCentralInitialSetup1.0.0.8.cab
O16 - DPF: {95460ABD-946A-46FF-9F56-268718323EEE} - http://scripts.downloadv3.com/binaries/EGDAccess/EGDACCESS_1068_XP.cab
O16 - DPF: {B2B0AEDF-7CDF-4792-BB67-7654AD1E1B13} - http://scripts.downloadv3.com/binaries/IA/sysinetsvc32_FR_XP.cab
O16 - DPF: {EFB22865-F3BC-4309-ADFA-C8E078A7F762} - http://www.sponsoradulto.com/fr/SysWebTelecom.cab
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation Service (ccPwdSvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\ccPwdSvc.exe
O23 - Service: Service Norton AntiVirus Auto-Protect (navapsvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\FICHIE~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\SNDSrvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Program Files\Fichiers communs\Symantec Shared\Security Center\SymWSC.exe

Configuration: windows XP