Pc devenu lent, besoin d'aide

Bonjour à tous, je suis sous xp pro et j'ai un problème: mon pc est devenu soudainement lent. J'ai eu auaparavant un problème de connexion sortante avec Generic host Process for Win32..., je ne sais pas s'il peut y avoir un lien.
Les symptomes: msn ne veut plus se connecter, mozilla tourne très lentement, tous les programmes mettent un temps fou à s'ouvrir et s'exécute moins rapidement. Je vous mets mon rapport Hijackthis, en espérant que vous puissiez m'aider:

Logfile of HijackThis v1.99.1
Scan saved at 14:27:45, on 12/02/2007
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\SlySoft\CloneCD\CloneCDTray.exe
C:\Program Files\Fichiers communs\ACD Systems\FR\DevDetect.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Program Files\MessengerPlus! 3\MsgPlus.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\Program Files\Logitech\Video\LogiTray.exe
C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\ctpmon.exe
C:\Program Files\FinePixViewer\QuickDCF.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpohmr08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\Program Files\InterVideo\Common\Bin\WinCinemaMgr.exe
C:\WINDOWS\system32\ctpmon.exe
C:\WINDOWS\system32\DRIVERS\CDANTSRV.EXE
C:\Program Files\Logitech\Video\FxSvr2.exe
C:\WINDOWS\system32\svchosts.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpoevm08.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\PROGRA~1\TRENDM~1\INTERN~1\PcCtlCom.exe
C:\WINDOWS\system32\svchost.exe
C:\PROGRA~1\TRENDM~1\INTERN~1\Tmntsrv.exe
C:\PROGRA~1\TRENDM~1\INTERN~1\tmproxy.exe
C:\PROGRA~1\TRENDM~1\INTERN~1\TmPfw.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\Bin\hpoSTS08.exe
C:\PROGRA~1\TRENDM~1\INTERN~1\PccGuide.exe
C:\Program Files\Teamspeak2_RC2\TeamSpeak.exe
C:\Program Files\Valve\Steam\Steam.exe
C:\Program Files\Spybot - Search & Destroy\SpybotSD.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Downloads\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.soi-katoey.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O3 - Toolbar: &VSAdd-in - {74DD705D-6834-439C-A735-A6DBE2677452} - C:\Program Files\VSAdd-in\VSAdd-in.dll
O4 - HKLM\..\Run: [CloneCDTray] "C:\Program Files\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [Device Detector] DevDetect.exe -autorun
O4 - HKLM\..\Run: [REGSHAVE] C:\Program Files\REGSHAVE\REGSHAVE.EXE /AUTORUN
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.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: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 - HKLM\..\Run: [ISUSPM Startup] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\isuspm.exe" -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678912345678] C:\Program Files\user32.exe
O4 - HKLM\..\Run: [IpWins] C:\Program Files\Ipwindows\ipwins.exe
O4 - HKLM\..\Run: [DllRunning] rundll32.exe "C:\WINDOWS\system32\yknspnjd.dll",setvm
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NBJ] "C:\Program Files\Ahead\Nero BackItUp\NBJ.exe"
O4 - HKCU\..\Run: [IncrediMail] C:\PROGRA~1\INCRED~1\bin\IncMail.exe /c
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [ctpmon] ctpmon.exe
O4 - Global Startup: Exif Launcher.lnk = ?
O4 - Global Startup: hp psc 1000 series.lnk = ?
O4 - Global Startup: hpoddt01.exe.lnk = ?
O4 - Global Startup: InterVideo WinCinema Manager.lnk = C:\Program Files\InterVideo\Common\Bin\WinCinemaMgr.exe
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O16 - DPF: {14B87622-7E19-4EA8-93B3-97215F77A6BC} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab31267.cab
O16 - DPF: {2250C29C-C5E9-4F55-BE4E-01E45A40FCF1} (CMediaMix Object) - http://musicmix.messenger.msn.com/Medialogic.CAB
O16 - DPF: {9122D757-5A4F-4768-82C5-B4171D8556A7} (PhotoPickConvert Class) - http://appdirectory.messenger.msn.com/AppDirectory/P4Apps/PhotoSwap/PhtPkMSN.cab
O16 - DPF: {B8BE5E93-A60C-4D26-A2DC-220313175592} (ZoneIntro Class) - http://messenger.zone.msn.com/binary/ZIntro.cab47946.cab
O16 - DPF: {F58E1CEF-A068-4C15-BA5E-587CAF3EE8C6} (MSN Chat Control 4.5) - http://chat.msn.com/controls/msnchat45.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - AppInit_DLLs: C:\WINDOWS\system32\systu2.dll
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: C-DillaSrv - C-Dilla Ltd - C:\WINDOWS\system32\DRIVERS\CDANTSRV.EXE
O23 - Service: Client IP-IPX - Unknown owner - C:\WINDOWS\system32\svchosts.exe" -e te-110-12-0000351 (file missing)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Trend Micro Central Control Component (PcCtlCom) - Trend Micro Incorporated. - C:\PROGRA~1\TRENDM~1\INTERN~1\PcCtlCom.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Trend Micro Real-time Service (Tmntsrv) - Trend Micro Incorporated. - C:\PROGRA~1\TRENDM~1\INTERN~1\Tmntsrv.exe
O23 - Service: Trend Micro Personal Firewall (TmPfw) - Trend Micro Inc. - C:\PROGRA~1\TRENDM~1\INTERN~1\TmPfw.exe
O23 - Service: Trend Micro Proxy Service (tmproxy) - Trend Micro Inc. - C:\PROGRA~1\TRENDM~1\INTERN~1\tmproxy.exe

Voilà, et merci d'avance!