Log Hijackthis à analyser

bjr,
j'ai une fenêtre intempestive qui s'ouvre régulièrement en bas à droite de l'écran et qui dit:
"Your computer is infected! Windows has detected spyware infection! ...."
L'icône est rouge avec une croix blanche au milieu.
Voici mon log.
Merci.

Logfile of HijackThis v1.99.1
Scan saved at 08:33:45, on 07/09/2005
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\Program Files\Ahead\InCD\InCDsrv.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\AVPersonal\AVWUPSRV.EXE
C:\WINDOWS\system32\cisvc.exe
C:\Program Files\Executive Software\DiskeeperLite\DKService.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Sunbelt Software\CounterSpy Client\sunasDtServ.exe
C:\Program Files\Sunbelt Software\CounterSpy Client\sunasServ.exe
C:\winstall.exe
E:\Program Files\MOUSE\MouseWare\MouseWare\system\em_exec.exe
C:\Lotus\Notes\NLNOTES.EXE
C:\Lotus\Notes\nhldaemn.EXE
C:\Program Files\Sunbelt Software\CounterSpy Client\CounterSpy.exe
C:\WINDOWS\system32\cidaemon.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Hijackthis Version Française\VERSION TRADUITE ORIGINALE.EXE

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = http://proxy.ac-besancon.fr:8080
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [DBZRVgdU] C:\WINDOWS\stroc.exe
O4 - HKLM\..\Run: [DBZRV÷h$vùõš/‚²ÆßC:\Program Files\ISTsvc\istsvc.exe] C:\WINDOWS\stroc.exe
O4 - HKLM\..\Run: [sunasDTServ] C:\Program Files\Sunbelt Software\CounterSpy Client\sunasDtServ.exe
O4 - HKLM\..\Run: [sunasServ] C:\Program Files\Sunbelt Software\CounterSpy Client\sunasServ.exe
O4 - HKLM\..\RunOnce: [CounterSpyCleaner] C:\Program Files\Sunbelt Software\CounterSpy Client\sunASCleaner.exe
O4 - HKCU\..\Run: [Windows installer] C:\winstall.exe
O8 - Extra context menu item: &Traduire à partir de l'anglais - res://c:\program files\google\GoogleToolbar2.dll/cmwordtrans.html
O8 - Extra context menu item: Pages liées - res://c:\program files\google\GoogleToolbar2.dll/cmbacklinks.html
O8 - Extra context menu item: Pages similaires - res://c:\program files\google\GoogleToolbar2.dll/cmsimilar.html
O8 - Extra context menu item: Recherche &Google - res://c:\program files\google\GoogleToolbar2.dll/cmsearch.html
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_01\bin\npjpi150_01.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_01\bin\npjpi150_01.dll
O10 - Broken Internet access because of LSP provider 'c:\program files\newdotnet\newdotnet6_38.dll' missing
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=36467&clcid=0x40...
O17 - HKLM\System\CCS\Services\Tcpip\..\{B97A42D8-F8D6-421C-85CB-96F1D72CEFE8}: NameServer = 195.221.85.2,194.57.91.200
O17 - HKLM\System\CCS\Services\Tcpip\..\{F6FBFC5F-E817-4FF8-86CA-682A24B07389}: NameServer = 195.221.85.2,194.57.91.200
O21 - SSODL: AIDA32_is1 - {D9E46181-B80C-DA73-0938-E7E4D64CEDD2} - c:\program files\aida32 - enterprise system information\pgafyj32.dll (file missing)
O23 - Service: AntiVir Service (AntiVirService) - H+BEDV Datentechnik GmbH - C:\Program Files\AVPersonal\AVGUARD.EXE
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: AntiVir Update (AVWUpSrv) - H+BEDV Datentechnik GmbH, Germany - C:\Program Files\AVPersonal\AVWUPSRV.EXE
O23 - Service: Diskeeper - Executive Software International, Inc. - C:\Program Files\Executive Software\DiskeeperLite\DKService.exe
O23 - Service: InCD Helper (InCDsrv) - Nero AG - C:\Program Files\Ahead\InCD\InCDsrv.exe
O23 - Service: NGClient - Symantec New Zealand Limited - C:\Program Files\Norton Ghost 6.0\ngctw32.exe