Ralentissements PC

Mon PC souffre de terribles ralentissements lors de l'ouverture de nouvelles fenetres. C'est particulierement insupportable sur internet, ou envoyer un simple email peut s'averer mission impossible. Je ne peux plus rien faire. J'ai tente tous les scans, nettoyages, demarrages selectifs et defrags possibles, mais helas, rien ne change. Impossible de formater dans l'immediat, car je suis a l'etranger et n'ai pas les CDs. J'ai absolument besoin de mon PC et surtout d'internet pour travailler chez moi. Merci si quelqu'un peut m'aider.

Pour gagner du temps, ci-dessous ma config et resultat Highjack.
Config : Celeron M 1.7 GHz, 512 RAM, DD 80 GG, Win XP

Highjack:
Logfile of HijackThis v1.99.1
Scan saved at 1:14:42, on 21.08.2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\Explorer.EXE
D:\PROGRA~1\Grisoft\AVG7\avgcc.exe
D:\Program Files\Synaptics\SynTP\SynTPEnh.exe
D:\WINDOWS\system32\ctfmon.exe
D:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
D:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
D:\WINDOWS\eHome\ehRecvr.exe
D:\WINDOWS\eHome\ehSched.exe
D:\WINDOWS\system32\dllhost.exe
D:\WINDOWS\system32\wscntfy.exe
D:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
https://www.rambler.ru/
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
O2 - BHO: Adobe PDF Reader Link Helper -
{06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Common
Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Groove GFS Browser Helper -
{72853161-30C5-4D22-B7F9-0BBC1D38A37E} -
D:\PROGRA~1\MICROS~2\Office12\GRA8E1~1.DLL
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} -
D:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O3 - Toolbar: Rambler-Àññèñòåíò - {468CD8A9-7C25-45FA-969E-3D925C689DC4}
- D:\Program Files\Rambler Assistant\ramblertoolbarU0.dll
O4 - HKLM\..\Run: [AVG7_CC] D:\PROGRA~1\Grisoft\AVG7\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [SynTPEnh] D:\Program
Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKCU\..\Run: [ctfmon.exe] D:\WINDOWS\system32\ctfmon.exe
O8 - Extra context menu item: E&xport to Microsoft Excel -
res://D:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Íàéòè ñ ïîìîùüþ Ðàìáëåðà -
res://D:\Program Files\Rambler Assistant\ramblertoolbarU0.dll/search.htm
O8 - Extra context menu item: Îïóáëèêîâàòü â Äíåâíèêå - res://D:\Program
Files\Rambler Assistant\ramblertoolbarU0.dll/planet.htm
O8 - Extra context menu item: Ïåðåâåñòè ñ ïîìîùüþ ñëîâàðåé Ðàìáëåðà -
res://D:\Program Files\Rambler Assistant\ramblertoolbarU0.dll/dic.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} -
D:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console -
{08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program
Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Send to OneNote -
{2670000A-7350-4f3c-8081-5663EE0C6C49} -
D:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote -
{2670000A-7350-4f3c-8081-5663EE0C6C49} -
D:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} -
%windir%\bdoscandel.exe (file missing)
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner v8 -
{85d1f590-48f4-11d9-9669-0800200c9a66} - %windir%\bdoscandel.exe (file
missing)
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} -
D:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} -
D:\Program Files\ICQLite\ICQLite.exe
O9 - Extra 'Tools' menuitem: ICQ Lite -
{B863453A-26C3-4e1f-A54D-A2CD196348E9} - D:\Program
Files\ICQLite\ICQLite.exe
O9 - Extra button: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} -
D:\Program Files\ICQ6\ICQ.exe
O9 - Extra 'Tools' menuitem: ICQ6 -
{E59EB121-F339-4851-A3BA-FE49C35617C2} - D:\Program Files\ICQ6\ICQ.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} -
D:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger -
{FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program
Files\Messenger\msmsgs.exe
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control)
- http://download.bitdefender.com/resources/scan8/oscan8.cab
O17 -
HKLM\System\CCS\Services\Tcpip\..\{5AEA0A3F-053C-4F52-A182-EAD9DA143F9B}:
NameServer = 172.16.1.1
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD}
- D:\PROGRA~1\MICROS~2\Office12\GR99D3~1.DLL
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} -
D:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} -
D:\Program Files\Common Files\Microsoft Shared\Help\hxds.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} -
D:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} -
D:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Filter hijack: text/xml - {807563E5-5146-11D5-A672-00B0D022E945} -
D:\PROGRA~1\COMMON~1\MICROS~1\OFFICE12\MSOXMLMF.DLL
O20 - Winlogon Notify: igfxcui - D:\WINDOWS\SYSTEM32\igfxdev.dll
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. -
D:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. -
D:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision
Corporation - D:\Program Files\Common
Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPodService - Apple Computer, Inc. - D:\Program
Files\iPod\bin\iPodService.exe