Analyse log HijackThis

Bonjour,

voici quelques jours que mon PC tourne au ralenti. J'ai lancé ad aware et spybot mais rien de beau. J'ai donc lancé un scan Hijack mais je ne connais pas du tout ce logiciel et je préfère donc demander à quelqu'un de plus expert son analyse de la situation.
Voici le log :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 00:23:17, on 05/11/2010
Platform: Unknown Windows (WinNT 6.01.3504)
MSIE: Internet Explorer v9.00 (9.00.7930.16406)
Boot mode: Safe mode with network support

Running processes:
D:\Windows\Explorer.EXE
D:\Windows\system32\ctfmon.exe
D:\Users\Charlotte\Downloads\HiJackThis.exe
D:\Users\Charlotte\AppData\Local\Google\Chrome\Application\chrome.exe
D:\Users\Charlotte\AppData\Local\Google\Chrome\Application\chrome.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - D:\Program Files\Java\jre6\bin\jp2ssv.dll
O4 - HKLM\..\Run: [avast5] "D:\Program Files\Alwil Software\Avast5\avastUI.exe" /nogui
O4 - HKCU\..\Run: [DAEMON Tools Lite] "D:\Program Files\DAEMON Tools Lite\DTLite.exe" -autorun
O4 - HKCU\..\Run: [SpybotSD TeaTimer] D:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://D:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: @D:\Windows\WindowsMobile\INetRepl.dll,-222 - {2EAF5BB1-070F-11D3-9307-00C04FAE2D4F} - D:\Windows\WindowsMobile\INetRepl.dll
O9 - Extra button: (no name) - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - D:\Windows\WindowsMobile\INetRepl.dll
O9 - Extra 'Tools' menuitem: @D:\Windows\WindowsMobile\INetRepl.dll,-223 - {2EAF5BB2-070F-11D3-9307-00C04FAE2D4F} - D:\Windows\WindowsMobile\INetRepl.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - D:\PROGRA~1\SPYBOT~1\SDHelper.dll
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - https://fpdownload.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: avast! Antivirus - AVAST Software - D:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Mail Scanner - AVAST Software - D:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: avast! Web Scanner - AVAST Software - D:\Program Files\Alwil Software\Avast5\AvastSvc.exe
O23 - Service: Device Error Recovery Service (dgdersvc) - Devguru Co., Ltd. - D:\Windows\system32\dgdersvc.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - D:\Windows\system32\nvvsvc.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies, Inc. - D:\Program Files\WinPcap\rpcapd.exe
O23 - Service: SBSD Security Center Service (SBSDWSCService) - Safer Networking Ltd. - D:\Program Files\Spybot - Search & Destroy\SDWinSec.exe


Merci d'avance pour vos réponses.