avast bug et les autres antivurs aussi

bonjour
j ai telecharger avast et il me lance une alerte a chaque fois que je ve utiliser internet explorer ou ad aware ou hijack this .
j ai meme essayer avec avg c est la meme chose que se passe t il svp ? voici mon loh hijack this :

Logfile of HijackThis v1.99.1
Scan saved at 09:33:34, on 27/12/2006
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2600.0000)

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:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Apps\ActivBoard\nhksrv.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\System32\igfxtray.exe
C:\WINDOWS\System32\hkcmd.exe
C:\PROGRA~1\MOUSEW~1\SYSTEM\EM_EXEC.EXE
C:\Apps\ActivBoard\MMKeybd.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Apps\ActivBoard\TrayMon.exe
C:\Apps\ActivBoard\OSD.exe
C:\WINDOWS\TEMP\VRT39.tmp
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\ARNAUD\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.avast.com/i_kat_207.php?lang=fre
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer fourni par Planetis
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\apps\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: SurfairyHlp Class - {E0B9B5FE-B66E-4FB0-A1D9-726F0E743CFD} - C:\Program Files\Surfairy\SurfairyPP.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [EM_EXEC] C:\PROGRA~1\MOUSEW~1\SYSTEM\EM_EXEC.EXE
O4 - HKLM\..\Run: [ACTIVBOARD] C:\Apps\ActivBoard\MMKeybd.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O9 - Extra button: Suggestions - {2223664C-1942-4276-9A2D-E8D8F547C5D2} - res://EffiPeled (file missing)
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: Netropa NHK Server (nhksrv) - Unknown owner - C:\Apps\ActivBoard\nhksrv.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe