Spywarestike et virus alert! SOS!!!!!

Bonjour à tous et toutes, J'ai un grave probleme avec mon ordi! et je suis pas un pro de l'informatique...
Un logitiel dont je n'arrive pas à me débarrasser : "Spywarestike"
et une icone : "Virus Alert!" tous les deux dans ma barre de menu Windows!
Qui pourait m'aider????
voici l'analyse de hijackthis :

Logfile of HijackThis v1.99.1
Scan saved at 21:27:14, on 24/01/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

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\Securitoo\av_fw\backweb\1044199\Program\SERVIC~1.EXE
C:\Program Files\Securitoo\av_fw\Anti-Virus\fsgk32st.exe
C:\Program Files\Securitoo\av_fw\backweb\1044199\program\fsbwsys.exe
C:\Program Files\Securitoo\av_fw\Anti-Virus\FSGK32.EXE
C:\Program Files\Securitoo\av_fw\fswsclds.exe
C:\Program Files\Securitoo\av_fw\Anti-Virus\fssm32.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Program Files\Securitoo\av_fw\backweb\1044199\Program\BackWeb-1044199.exe
C:\WINDOWS\System32\PAStiSvc.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Securitoo\av_fw\Common\FSMA32.EXE
C:\Program Files\Securitoo\av_fw\Common\FSMB32.EXE
C:\Program Files\Securitoo\av_fw\Common\FCH32.EXE
C:\Program Files\Securitoo\av_fw\Common\FAMEH32.EXE
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Securitoo\av_fw\Common\FSM32.EXE
C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
C:\Program Files\SpywareStrike\SpywareStrike.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\SpywareStrike\SpywareStrike.exe
C:\Program Files\Nikon\NkView5\NkvMon.exe
C:\Program Files\Sagem - Utilitaire réseau pour Clé USB Wi-Fi 802.11g\WLANUTL.exe
C:\Program Files\Securitoo\av_fw\Anti-Virus\fsav32.exe
C:\Program Files\Securitoo\av_fw\DFW\Program\fsdfwd.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Admin\Bureau\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://g.msn.fr/0SEFRFR/SAOS01?FORM=TOOLBR
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://g.msn.fr/0SEFRFR/SAOS01?FORM=TOOLBR
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://runonce.msn.com/?v=msgrv75
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://g.msn.fr/0SEFRFR/SAOS01?FORM=TOOLBR
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: HomepageBHO - {e0103cd4-d1ce-411a-b75b-4fec072867f4} - C:\WINDOWS\system32\hp93DE.tmp
O3 - Toolbar: FlashGet Bar - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - (no file)
O3 - Toolbar: Barre d'outils MSN Search - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll (file missing)
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\Messenger Plus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [F-Secure Manager] "C:\Program Files\Securitoo\av_fw\Common\FSM32.EXE" /splash
O4 - HKLM\..\Run: [F-Secure TNB] "C:\Program Files\Securitoo\av_fw\TNB\TNBUtil.exe" /CHECKALL /WAITFORSW
O4 - HKLM\..\Run: [FSASWREG] "C:\Program Files\Securitoo\av_fw\Anti-Spyware\fsaswreg.exe"
O4 - HKLM\..\Run: [WildTangent CDA] "C:\Program Files\WildTangent\Apps\CDA\GameDrvr.exe" /startup "C:\Program Files\WildTangent\Apps\CDA\cdaEngine0500.dll"
O4 - HKLM\..\Run: [birdexitsendbits] C:\Documents and Settings\All Users.WINDOWS\Application Data\Mags clock bird exit\hidetwo.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0_06\bin\jusched.exe
O4 - HKLM\..\Run: [SpywareStrike] C:\Program Files\SpywareStrike\SpywareStrike.exe /h
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - Startup: NetAnalyse.lnk = C:\Program Files\NetAnalyse\NetAnalyse.exe
O4 - Global Startup: NkvMon.exe.lnk = C:\Program Files\Nikon\NkView5\NkvMon.exe
O4 - Global Startup: Sagem - Utilitaire réseau pour Clé USB Wi-Fi 802.11g.lnk = ?
O4 - Global Startup: Windows Desktop Search.lnk = C:\Program Files\MSN Toolbar Suite\DS\02.05.0001.1119\fr-fr\bin\WindowsSearch.exe
O8 - Extra context menu item: &MSN Search - res://C:\Program Files\MSN Toolbar Suite\TB\02.05.0000.1105\fr-fr\msntb.dll/search.htm
O8 - Extra context menu item: &Search - http://bar.mywebsearch.com/menusearch.html?p=ZNxdm414YY...
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\Microsoft Office\OFFICE11\EXCEL.EXE/3000
O8 - Extra context menu item: Ouvrir dans un nouvel onglet d'arrière-plan - res://C:\Program Files\MSN Toolbar Suite\TAB\02.05.0000.1105\fr-fr\msntabres.dll/229?da263a46c17f49968b781beaee2fa363
O8 - Extra context menu item: Ouvrir dans un nouvel onglet de premier plan - res://C:\Program Files\MSN Toolbar Suite\TAB\02.05.0000.1105\fr-fr\msntabres.dll/230?da263a46c17f49968b781beaee2fa363
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\system32\msjava.dll
O9 - Extra button: Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\WINDOWS\system32\shdocvw.dll
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {4528BBE0-4E08-11D5-AD55-00010333D0AD} - C:\WINDOWS\system32\shdocvw.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\Microsoft Office\OFFICE11\REFIEBAR.DLL
O16 - DPF: fdjeux - https://www.fdjeux.net/classes/fdjeux.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: Securitoo AntiVirus Firewall (BackWeb Client - 1044199) - Unknown owner - C:\PROGRA~1\Securitoo\av_fw\backweb\1044199\Program\SERVIC~1.EXE
O23 - Service: F-Secure Gatekeeper Handler Starter - F-Secure Corp. - C:\Program Files\Securitoo\av_fw\Anti-Virus\fsgk32st.exe
O23 - Service: F-Secure Authentication Agent (FSAA) - Unknown owner - C:\Program Files\Securitoo\av_fw\Common\FSAA.EXE (file missing)
O23 - Service: fsbwsys - F-Secure Corp. - C:\Program Files\Securitoo\av_fw\backweb\1044199\program\fsbwsys.exe
O23 - Service: F-Secure Distributed Firewall Daemon (FSDFWD) - F-Secure Corporation - C:\Program Files\Securitoo\av_fw\DFW\Program\fsdfwd.exe
O23 - Service: F-Secure Management Agent (FSMA) - F-Secure Corporation - C:\Program Files\Securitoo\av_fw\Common\FSMA32.EXE
O23 - Service: F-Secure Windows Security Center Legacy Detection Service (Fswsclds) - F-Secure Corporation - C:\Program Files\Securitoo\av_fw\fswsclds.exe
O23 - Service: STI Simulator - Unknown owner - C:\WINDOWS\System32\PAStiSvc.exe