Redirection google + mise a jour antvirus etc

Bonjour,

Voila j'ai un probleme qui consiste a

1 - google me redirige sur une pub quand je click sur un lien comme celui-ci pas exemple http://216.246.127.28/screen?aid=1031&cid=268&subid=utr_2477&xargs=ZmlkPTY5OSZrZXk9YWR2YW5jZWQmcmE9ODIuMjQwLjU3LjEyNiZ1YT1Nb3ppbGxhLzUuMCAoV2luZG93czsgVTsgV2luZG93cyBOVCA1LjE7IGZyOyBydjoxLjkuMC42KSBHZWNrby8yMDA5MDExOTEzIEZpcmVmb3gvMy4wLjYmbWQ1dWE9NmE5ZTg0OGVmZmYxYzNmOTI5OGQxYTNiMDllMzcxYmMmYWR2PXNwZWVkLWRvd25sb2FkaW5nLmNvbSZwb3M9MiZiaWQ9MC4wMDU1MiZyZWY9Ym9ua3NlYXJjaC5jb20mdXQ9MTIzNTIzMDA1MjozMDg4NjY&url=aHR0cDovLzUwMDAzLnNtYXJ0Yml6c2VhcmNoLmNvbS94dHJfbmV3P3E9YWR2YW5jZWQmc2lkPTk4NTQyMjE1NiZzYT0xOCZwPTEmcz0zMjkwNg&s=1

2 - je ne peut metre a jour aucun antivirus ou anti spyware
3 - je ne peut rien télécharger a partir du site microsoft

HijackThis :

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17:28:56, on 21/02/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

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:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\DigitalPersona\Bin\DPWinLct.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\DigitalPersona\Bin\DpHost.exe
C:\Program Files\Marvell\61xx\Apache2\bin\Apache.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Marvell\61xx\Apache2\bin\Apache.exe
C:\Program Files\DigitalPersona\Bin\DPFUSMgr.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\DigitalPersona\Bin\DPAgnt.exe
C:\WINDOWS\RTHDCPL.EXE
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Skype\Phone\Skype.exe
C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
C:\Program Files\Pinnacle\Shared Files\Programs\StrmServer\StrmServer.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Skype\Plugin Manager\skypePM.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Spyware Terminator\sp_rsser.exe
C:\HijackThis\HijackThis.exe

O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [DPAgnt] C:\Program Files\DigitalPersona\Bin\DPAgnt.exe
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [AdobeCS4ServiceManager] "C:\Program Files\Fichiers communs\Adobe\CS4ServiceManager\CS4ServiceManager.exe" -launchedbylogin
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Program Files\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\CTFMON.EXE (User 'Default user')
O4 - Global Startup: Pinnacle Streaming Server.lnk = C:\Program Files\Pinnacle\Shared Files\Programs\StrmServer\StrmServer.exe
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search && Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
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
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: DPWLN - C:\WINDOWS\system32\DPWLEvHd.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Windows XP FUS Manager (DPFUSMgr) - DigitalPersona, Inc. - C:\Program Files\DigitalPersona\Bin\DPFUSMgr.exe
O23 - Service: Biometric Authentication Service (DpHost) - DigitalPersona, Inc. - C:\Program Files\DigitalPersona\Bin\DpHost.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Marvell RAID Event Agent (Marvell RAID) - Unknown owner - C:\Program Files\Marvell\61xx\svc\mvraidsvc.exe
O23 - Service: MRU Web Service (MRUWebService) - Apache Software Foundation - C:\Program Files\Marvell\61xx\Apache2\bin\Apache.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Spyware Terminator Realtime Shield Service (sp_rssrv) - Crawler.com - C:\Program Files\Spyware Terminator\sp_rsser.exe