Bonjour,
Norton m'a détecté un virus du nom de Download.Trojan, et depuis je ne cesse d'avoir ces fichues fenêtres de net-offers.net.
y-aurait-il un lien ?
J'ai suivi le conseil de regis59 et voici le scan.
Milles mercis pour votre aide.

Logfile of HijackThis v1.99.1
Scan saved at 14:24:58, on 14/06/2005
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (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:\PROGRA~1\SYMANT~1\SYMANT~1\DefWatch.exe
C:\Program Files\Dell\OpenManage\Client\Iap.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\PROGRA~1\SYMANT~1\SYMANT~1\Rtvscan.exe
C:\Program Files\Intel\ASF Agent\ASFAgent.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\hkcmd.exe
C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb08.exe
C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\Program Files\Hotbar\Bin\4.6.1.0\HbOEAddOn.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Calendrier\Cld2000.exe
C:\Program Files\Hotbar\Bin\4.6.1.0\HbSrv.exe
C:\Program Files\Outlook Express\MSIMN.EXE
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\PowerArchiver\POWERARC.EXE
C:\DOCUME~1\mcd\LOCALS~1\Temp\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/countries/fr/fra/gen/default.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.wanadoo.fr/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/countries/fr/fra/gen/default.htm
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.euro.dell.com/countries/fr/fra/gen/default.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 5.0\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: ShprRprts - {2A8A997F-BB9F-48F6-AA2B-2762D50F9289} - C:\Program Files\ShopperReports\Bin\1.0.4.0\ShprRprt.dll
O2 - BHO: Hotbar - {B195B3B3-8A05-11D3-97A4-0004ACA6948E} - C:\Program Files\Hotbar\Bin\4.6.1.0\HbHostIE.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Hotbar - {B195B3B3-8A05-11D3-97A4-0004ACA6948E} - C:\Program Files\Hotbar\Bin\4.6.1.0\HbHostIE.dll
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\SYMANT~1\vptray.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\System32\spool\drivers\w32x86\3\hpztsb08.exe
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd.exe
O4 - HKLM\..\Run: [DeviceDiscovery] C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
O4 - HKLM\..\Run: [krfibxpt] C:\WINDOWS\System32\thsykkqp.exe
O4 - HKLM\..\Run: [Anti Trojan Elite] C:\Program Files\Anti Trojan Elite\TJEnder.exe :NO
O4 - HKLM\..\Run: [Hotbar] C:\Program Files\Hotbar\Bin\4.6.1.0\HbOEAddOn.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Cld2000.exe] C:\Program Files\Calendrier\Cld2000.exe
O4 - Startup: Task Plus.lnk = C:\Program Files\TaskPlus\taskplus0.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: ShopperReports - Compare travel rates - {946B3E9E-E21A-49c8-9F63-900533FAFE14} - C:\Program Files\ShopperReports\Bin\1.0.4.0\ShprRprt.dll
O9 - Extra button: ShopperReports - Compare product prices - {E77EDA01-3C56-4a96-8D08-02B42891C169} - C:\Program Files\ShopperReports\Bin\1.0.4.0\ShprRprt.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
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = gda.com
O17 - HKLM\Software\..\Telephony: DomainName = gda.com
O17 - HKLM\System\CCS\Services\Tcpip\..\{B62062AD-299B-461B-B0D7-248819A54C14}: NameServer = 192.168.1.100
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = gda.com
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O20 - Winlogon Notify: NavLogon - C:\WINDOWS\System32\NavLogon.dll
O23 - Service: ASF Agent (ASFAgent) - Intel Corporation - C:\Program Files\Intel\ASF Agent\ASFAgent.exe
O23 - Service: DefWatch - Symantec Corporation - C:\PROGRA~1\SYMANT~1\SYMANT~1\DefWatch.exe
O23 - Service: Iap - Dell Computer Corporation - C:\Program Files\Dell\OpenManage\Client\Iap.exe
O23 - Service: Intel(R) NMS (NMSSvc) - Intel Corporation - C:\WINDOWS\System32\NMSSvc.exe
O23 - Service: Symantec AntiVirus Client (Norton AntiVirus Server) - Symantec Corporation - C:\PROGRA~1\SYMANT~1\SYMANT~1\Rtvscan.exe