Une dlll recalsitrante (IadHide5.dll)

Bonjour,
Bonjour, j'ai une DLL "Iadhide5.dll" dans mon fichier TEMP ,je n'arrive pas a l'enlever totalement car il revient.Qu'est ce que c'est, un virus ? un spyware ? un trojan ? autre ? De quel log vient-il ? Quelle est la methode pour le supprimer definitivement ? Je suis sous xp.Merci pour vos reponses

et voilas un raport de hijhackthis

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 11:48:19, on 2/11/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16735)
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\F-Secure\BackWeb\7681197\Program\SERVIC~1.EXE
C:\Program Files\F-Secure\Anti-Virus\fsgk32st.exe
C:\Program Files\F-Secure\BackWeb\7681197\program\fsbwsys.exe
C:\Program Files\F-Secure\Anti-Virus\FSGK32.EXE
C:\Program Files\F-Secure\Common\FSMA32.EXE
C:\Program Files\F-Secure\Common\FSMB32.EXE
C:\Program Files\F-Secure\Anti-Virus\fssm32.exe
C:\Program Files\F-Secure\Common\FCH32.EXE
C:\Program Files\F-Secure\BackWeb\7681197\Program\F-Secure Automatic Update.exe
C:\Program Files\F-Secure\Anti-Virus\fsqh.exe
C:\Program Files\F-Secure\Common\FAMEH32.EXE
C:\Program Files\F-Secure\Anti-Virus\fsrw.exe
C:\Program Files\F-Secure\Common\FNRB32.EXE
C:\Program Files\F-Secure\FWES\Program\fsdfwd.exe
C:\Program Files\F-Secure\Common\FIH32.EXE
C:\Program Files\F-Secure\Common\FSM32.EXE
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\VirtualExpander\VirtualExpander.exe
C:\Program Files\F-Secure\Anti-Virus\fsav32.exe
C:\Program Files\F-Secure\FSGUI\fsguidll.exe
C:\PROGRA~1\F-Secure\ANTI-S~1\fsaw.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.commentcamarche.net/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O4 - HKLM\..\Run: [F-Secure Manager] "C:\Program Files\F-Secure\Common\FSM32.EXE" /splash
O4 - HKLM\..\Run: [F-Secure TNB] "C:\Program Files\F-Secure\TNB\TNBUtil.exe" /CHECKALL /WAITFORSW
O4 - HKLM\..\RunOnce: [KB926239] rundll32.exe apphelp.dll,ShimFlushCache
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: VirtualExpander.lnk = C:\WINDOWS\system32\VirtualExpander\VirtualExpander.exe
O4 - Global Startup: F-Secure Automatic Update.lnk = C:\Program Files\F-Secure\BackWeb\7681197\program\F-Secure Automatic Update.exe
O8 - Extra context menu item: &Block this popup - C:\Program Files\F-Secure\Anti-Spyware\blockpopups.htm
O9 - Extra button: IE Shield - {300DB664-75B5-47c0-8B45-A44ACCF73C00} - C:\Program Files\F-Secure\Anti-Spyware\ieshield.dll
O9 - Extra 'Tools' menuitem: IE Shield... - {300DB664-75B5-47c0-8B45-A44ACCF73C00} - C:\Program Files\F-Secure\Anti-Spyware\ieshield.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O23 - Service: F-Secure Automatic Update (BackWeb Plug-in - 7681197) - F-Secure Automatic Update - C:\PROGRA~1\F-Secure\BackWeb\7681197\Program\SERVIC~1.EXE
O23 - Service: FSGKHS (F-Secure Gatekeeper Handler Starter) - F-Secure Corp. - C:\Program Files\F-Secure\Anti-Virus\fsgk32st.exe
O23 - Service: F-Secure Network Request Broker - F-Secure Corporation - C:\Program Files\F-Secure\Common\FNRB32.EXE
O23 - Service: fsbwsys - F-Secure Corp. - C:\Program Files\F-Secure\BackWeb\7681197\program\fsbwsys.exe
O23 - Service: F-Secure Anti-Virus Firewall Daemon (FSDFWD) - F-Secure Corporation - C:\Program Files\F-Secure\FWES\Program\fsdfwd.exe
O23 - Service: F-Secure Management Agent (FSMA) - F-Secure Corporation - C:\Program Files\F-Secure\Common\FSMA32.EXE