IEXPLORE.EXE et sqlserver.dll Trojan.Maha.a Virus

bonjour j'ai un problème avec un trojan nommé Maha.a...j'ai fini par pouvoir l'effacer chaque fois que j'ouvre mon ordinateur puisque que j'avais toujours IEXPLORE.EXE dans mon taskmanager. Et lorsque j'arrete le fichier je peut par la suite effacer mon virus sqlserver.dll (nommé trojan.maha.a par AVG).....mais mon problème c,est qu'il revient tout le temps alors comment faire pour m'en débarasser...voici mon log the hijackthis......merci à l'avance


Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 7:10:58 PM, on 12/16/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16574)
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Adobe\Photoshop Elements 5.0\PhotoshopElementsFileAgent.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\LxrSII1s.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Common Files\BitDefender\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Common Files\BitDefender\BitDefender Update Service\livesrv.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\BitDefender\BitDefender 2008\vsserv.exe
C:\Program Files\Digital Media Reader\readericon45G.exe
C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
C:\Program Files\BitDefender\BitDefender 2008\bdagent.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\Logitech\SetPoint\SetPoint.exe
C:\Program Files\Common Files\Logitech\KHAL\KHALMNPR.EXE
C:\WINDOWS\System32\svchost.exe
C:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\WINDOWS\system32\HPZinw12.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\Owner\Desktop\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O3 - Toolbar: BitDefender Toolbar - {381FFDE8-2394-4f90-B10D-FC6124A40F8C} - C:\Program Files\BitDefender\BitDefender 2008\IEToolbar.dll
O4 - HKLM\..\Run: [readericon] C:\Program Files\Digital Media Reader\readericon45G.exe
O4 - HKLM\..\Run: [Recguard] %WINDIR%\SMINST\RECGUARD.EXE
O4 - HKLM\..\Run: [System Security Moniter] C:\WINDOWS\crsst.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [BitDefender Antiphishing Helper] "C:\Program Files\BitDefender\BitDefender 2008\IEShow.exe"
O4 - HKLM\..\Run: [BDAgent] "C:\Program Files\BitDefender\BitDefender 2008\bdagent.exe"
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKCU\..\Run: [LDM] C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Startup: Adobe Gamma.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - Global Startup: Logitech SetPoint.lnk = C:\Program Files\Logitech\SetPoint\SetPoint.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
O18 - Protocol: bwfile-8876480 - {9462A756-7B47-47BC-8C80-C34B9B80B32B} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\GAPlugProtocol-8876480.dll
O23 - Service: Adobe Active File Monitor V5 (AdobeActiveFileMonitor5.0) - Unknown owner - C:\Program Files\Adobe\Photoshop Elements 5.0\PhotoshopElementsFileAgent.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: BitDefender Desktop Update Service (LIVESRV) - BitDefender S.R.L. - C:\Program Files\Common Files\BitDefender\BitDefender Update Service\livesrv.exe
O23 - Service: Lexar Secure II (LxrSII1s) - Unknown owner - C:\WINDOWS\SYSTEM32\LxrSII1s.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - BitDefender S.R.L. - C:\Program Files\BitDefender\BitDefender 2008\vsserv.exe
O23 - Service: WMP54Gv4SVC - GEMTEKS - C:\Program Files\Linksys Wireless-G PCI Wireless Network Monitor\WLService.exe
O23 - Service: BitDefender Communicator (XCOMM) - BitDefender - C:\Program Files\Common Files\BitDefender\BitDefender Communicator\xcommsvr.exe

--
End of file - 5703 bytes