Au secours : un virus me bloque !!!

Bonjour,
Un ou plusieurs virus me bloque sur Firefox et surtout m'empêche de lancer certaines application comme malwarebytes.

Voici un rapport de hijack.
Messieurs les cracks, j'ai besoin de toutes vos compétences !
D'avance merci beaucoup !!!

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 02:13:40, on 19/11/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

Running processes:
C:\WINDOWS\system32\csrss.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\svchost.exe
C:\Program Files\Sygate\SPF\smc.exe
C:\WINDOWS\system32\userinit.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe
C:\Program Files\Analog Devices\SoundMAX\SMax4PNP.exe
C:\WINDOWS\AGRSMMSG.exe
C:\Program Files\Apoint2K\Apoint.exe
C:\WINDOWS\system32\igfxtray.exe
C:\WINDOWS\system32\hkcmd.exe
C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe
C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\hpq\HP Wireless Assistant\HP Wireless Assistant.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\Program Files\Apoint2K\Apntex.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\HPQ\Shared\hpqwmi.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www8.hp.com/fr/fr/home.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = "C:\Program Files\Outlook Express\msimn.exe"
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - {0579B4B6-0293-4d73-B02D-5EBB0BA0F0A2} - (no file)
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,C:\WINDOWS\system32\twext.exe,
O2 - BHO: C:\WINDOWS\system32\jsne87fidgf.dll - {c5bf49a2-94f3-42bd-f434-3604812c897d} - C:\WINDOWS\system32\jsne87fidgf.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] "C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE" /SYNC
O4 - HKLM\..\Run: [PHIME2002A] "C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE" /IMEName
O4 - HKLM\..\Run: [SoundMAXPnP] "C:\Program Files\Analog Devices\SoundMAX\SMax4PNP.exe"
O4 - HKLM\..\Run: [SoundMAX] "C:\Program Files\Analog Devices\SoundMAX\Smax4.exe" /tray
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [Apoint] "C:\Program Files\Apoint2K\Apoint.exe"
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [Cpqset] C:\Program Files\HPQ\Default Settings\cpqset.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Program Files\Hp\HP Software Update\HPWuSchd2.exe"
O4 - HKLM\..\Run: [eabconfg.cpl] "C:\Program Files\HPQ\Quick Launch Buttons\EabServr.exe" /Start
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [hpWirelessAssistant] "C:\Program Files\hpq\HP Wireless Assistant\HP Wireless Assistant.exe"
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [ntuser] C:\WINDOWS\system32\drivers\ctfmon.exe
O4 - HKLM\..\Run: [autoload] C:\Documents and Settings\Briand\Local Settings\Application Data\spool.exe
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [SmcService] C:\PROGRA~1\Sygate\SPF\smc.exe -startgui
O4 - HKCU\..\Run: [gadcom] "C:\Documents and Settings\Briand\Application Data\gadcom\gadcom.exe" 61A847B5BBF72810369239466188719AB689201522886B092CBD44BD8689220221DD3257
O4 - HKCU\..\Run: [Twain] C:\Documents and Settings\Briand\Application Data\Twain\Twain.exe
O4 - HKCU\..\Run: [ntuser] C:\WINDOWS\system32\drivers\ctfmon.exe
O4 - HKUS\.DEFAULT\..\Run: [brastk] C:\WINDOWS\system32\brastk.exe (User 'Default user')
O4 - HKUS\.DEFAULT\..\Run: [ntuser] C:\WINDOWS\system32\drivers\ctfmon.exe (User 'Default user')
O4 - HKUS\.DEFAULT\..\Run: [autoload] C:\Documents and Settings\LocalService.AUTORITE NT\Local Settings\Application Data\spool.exe (User 'Default user')
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~3\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\OFFICE11\REFIEBAR.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
O11 - Options group: [java_sun] Java (Sun)
O14 - IERESET.INF: START_PAGE_URL=https://www8.hp.com/fr/fr/home.html
O20 - AppInit_DLLs: karna.dat
O20 - Winlogon Notify: winctrl32 - WinCtrl32.dll (file missing)
O20 - Winlogon Notify: zqtcrtb - C:\WINDOWS\
O22 - SharedTaskScheduler: mcb7uehuj3n8weuhejsw - {C5BF49A2-94F3-42BD-F434-3604812C897D} - C:\WINDOWS\system32\jsne87fidgf.dll
O23 - Service: Avira AntiVir Personal - Free Antivirus Scheduler (antivirscheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (antivirservice) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Apple Mobile Device - Apple, Inc. - C:\Program Files\Fichiers communs\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: FCI (fci) - Unknown owner - C:\WINDOWS\system32\svchost.exe:ext.exe (file missing)
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: HP WMI Interface (hpqwmi) - Hewlett-Packard Development Company, L.P. - C:\Program Files\HPQ\Shared\hpqwmi.exe
O23 - Service: ICF (icf) - Unknown owner - C:\WINDOWS\system32\svchost.exe:ext.exe (file missing)
O23 - Service: Java Quick Starter (javaquickstarterservice) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Planificateur de tâches (Schedule) - Unknown owner - C:\WINDOWS\system32\drivers\ctfmon.exe (file missing)
O23 - Service: Sygate Personal Firewall (smcservice) - Sygate Technologies, Inc. - C:\Program Files\Sygate\SPF\smc.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe