Probleme pop up ou virus ???

salut, j ai un probleme, je n arrete pas d avoir des pages internet qui s ouvre me proposant des logiciels antivirus, j ai eu une attaque il y a peu et depuis c est le bordel, quelqu un peu m aider !!!

Logfile of HijackThis v1.99.1
Scan saved at 18:29:52, on 28/02/2007
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\csrss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\Ati2evxx.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\System32\svchost.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\system32\LEXBCES.EXE
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\system32\LEXPPS.EXE
D:\WINDOWS\system32\Ati2evxx.exe
D:\WINDOWS\Explorer.EXE
D:\Program Files\Savescreen\Savescreen.exe
D:\WINDOWS\system32\svchost.exe
D:\Program Files\Lexmark 1200 Series\lxczbmgr.exe
D:\Program Files\ATI Technologies\ATI.ACE\cli.exe
D:\Program Files\MSN Messenger\MsnMsgr.Exe
D:\Program Files\Lexmark 1200 Series\lxczbmon.exe
D:\Program Files\ATI Multimedia\main\ATIDtct.EXE
D:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
D:\Program Files\ATI Technologies\ATI.ACE\CLI.exe
D:\Program Files\Rainlendar\Rainlendar.exe
D:\WINDOWS\system32\wscntfy.exe
D:\WINDOWS\System32\alg.exe
D:\Program Files\MSN Messenger\usnsvc.exe
D:\WINDOWS\System32\svchost.exe
D:\PROGRA~1\IncrediMail\bin\IMApp.exe
D:\PROGRA~1\MOZILLA FIREFOX\FIREFOX.EXE
D:\Poker\Poker 770\casino.exe
D:\Program Files\Mozilla Firefox\firefox.exe
D:\Program Files\eMule\Incoming\HijackThis.exe

R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page = \blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O3 - Toolbar: (no name) - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - (no file)
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - d:\program files\google\googletoolbar2.dll
O3 - Toolbar: &VSAdd-in - {74DD705D-6834-439C-A735-A6DBE2677452} - D:\Program Files\VSAdd-in\VSAdd-in.dll (file missing)
O4 - HKLM\..\Run: [Savescreen] D:\Program Files\Savescreen\Savescreen.exe
O4 - HKLM\..\Run: [Lexmark 1200 Series] "D:\Program Files\Lexmark 1200 Series\lxczbmgr.exe"
O4 - HKLM\..\Run: [ATICCC] "D:\Program Files\ATI Technologies\ATI.ACE\cli.exe" runtime
O4 - HKLM\..\Run: [DllRunning] rundll32.exe "D:\WINDOWS\system32\iosgavao.dll",setvm
O4 - HKCU\..\Run: [MsnMsgr] "D:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [ATI DeviceDetect] D:\Program Files\ATI Multimedia\main\ATIDtct.EXE
O4 - HKCU\..\Run: [swg] D:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
O4 - Startup: Rainlendar.lnk = D:\Program Files\Rainlendar\Rainlendar.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = D:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Barre d'état système d'ATI CATALYST.lnk = D:\Program Files\ATI Technologies\ATI.ACE\CLI.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://D:\PROGRA~1\Microsoft Office\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\j2re1.4.2_05\bin\npjpi142_05.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\Microsoft Office\OFFICE11\REFIEBAR.DLL
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - D:\PROGRA~1\MSN Messenger\msgrapp.8.1.0178.00.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - D:\PROGRA~1\MSN Messenger\msgrapp.8.1.0178.00.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - D:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Adobe LM Service - Unknown owner - D:\Program Files\Fichiers communs\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - D:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - D:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Google Updater Service (gusvc) - Google - D:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - D:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: Microsoft authenticate service (MsaSvc) - Unknown owner - D:\WINDOWS\system32\msasvc.exe (file missing)