Ralentissement mon pc sans raison apparente..

Bonjour,depuis quelque temps mon pc se met à ralentir et saccader énormément à chaque fois que je lance une application un peu important ou quand je télécharge sur internet....g un hp paviliion dv 8000 avec un processuer amd
turion 64 mobile technology ml 34 avec 1.8ghz et 1giga de ram....et il tournait super bien avant peu...
merci si quelqun peu tmaider...
je poste aussi une rapport hijackthis si ca peut aider...

Logfile of HijackThis v1.99.0
Scan saved at 19:19:54, on 10/04/2008
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\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
c:\program files\common files\logishrd\lvmvfm\LVPrcSrv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe
C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
C:\Program Files\Windows Live\Messenger\usnsvc.exe
C:\WINDOWS\system32\msiexec.exe
C:\Program Files\AMD\AMD Power Monitor\AMD_PwrMon.exe
C:\Documents and Settings\boris\Desktop\outil pc\HijackThis.exe
C:\Program Files\Mozilla Firefox\firefox.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O4 - HKLM\..\Run: [ATIPTA] "C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe"
O4 - HKLM\..\Run: [eabconfg.cpl] C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe /Start
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [Cpqset] C:\Program Files\HPQ\Default Settings\cpqset.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra button: Send to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{2FBB7F7C-5898-4213-BBDA-D26B3B41D74F}: NameServer = 212.27.54.252,212.27.53.252
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\PROGRA~1\MICROS~2\Office12\GR99D3~1.DLL
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WINDOW~4\MESSEN~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WINDOW~4\MESSEN~1\MSGRAP~1.DLL
O18 - Filter hijack: text/xml - {807563E5-5146-11D5-A672-00B0D022E945} - C:\PROGRA~1\COMMON~1\MICROS~1\OFFICE12\MSOXMLMF.DLL
O23 - Service: AntiVir PersonalEdition Classic Scheduler - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Program Files\Common Files\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files\Hewlett-Packard\Shared\hpqwmiex.exe
O23 - Service: Service de l'iPod - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Process Monitor - Logitech Inc. - c:\program files\common files\logishrd\lvmvfm\LVPrcSrv.exe
O23 - Service: LVSrvLauncher - Logitech Inc. - C:\Program Files\Common Files\LogiShrd\SrvLnch\SrvLnch.exe