[Virus] internet bizarre

Bonjour,

depuis ce matin, ma connexion internet se comporte bizarrement :
> pour certains sites (ex : google.fr) pas de problème ça marche comme d'hab
> pour d'autres, impossible de me connecter (ex : foolstep.com)

Mon antivirus refuse de s'updater (voilà pourquoi je pense à un virus) et ne trouve rien quand je scanne.

Je suis chez neuf telecom (neufbox) sous XP SP1, j'utilise firefox, et mon antivirus est antivir guard.

J'ai lancé un hijack, voici le log :

Logfile of HijackThis v1.99.1
Scan saved at 22:29:29, on 21/02/2006
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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:\WINDOWS\SYSTEM32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Messenger Plus! 3\MsgPlus.exe
C:\Program Files\Java\jre1.5.0\bin\jusched.exe
C:\WINDOWS\System32\taskswitch.exe
C:\Program Files\AntiVir PersonalEdition Classic\avgnt.exe
C:\themeGold55\CursorXP\CursorXP.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\Fast.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Laurent\Bureau\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.neuf.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: IeCatch2 Class - {A5366673-E8CA-11D3-9CD9-0090271D075B} - C:\PROGRA~1\FlashGet\jccatch.dll
O3 - Toolbar: FlashGet Bar - {E0E899AB-F487-11D5-8D29-0050BA6940E3} - C:\PROGRA~1\FlashGet\fgiebar.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\Messenger Plus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0\bin\jusched.exe
O4 - HKLM\..\Run: [CoolSwitch] C:\WINDOWS\System32\taskswitch.exe
O4 - HKLM\..\Run: [FastUser] C:\WINDOWS\System32\fast.exe
O4 - HKLM\..\Run: [UIUCU] C:\DOCUME~1\Laurent\LOCALS~1\Temp\UIUCU.EXE -CLEAN_UP -S
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [UpgConfVer] "C:\Program Files\Panda Software\Panda Platinum Internet Security\UpgConf.exe" /v:8.05.02
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKCU\..\Run: [CursorXP] C:\themeGold55\CursorXP\CursorXP.exe -s
O4 - HKCU\..\Run: [MessengerPlus3] "C:\Program Files\Messenger Plus! 3\MsgPlus.exe" /WinStart
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\System32\ctfmon.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: Download All by FlashGet - C:\Program Files\FlashGet\jc_all.htm
O8 - Extra context menu item: Download using FlashGet - C:\Program Files\FlashGet\jc_link.htm
O8 - Extra context menu item: E&xporter vers 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\jre1.5.0\bin\npjpi150.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra button: FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:\PROGRA~1\FlashGet\flashget.exe
O9 - Extra 'Tools' menuitem: &FlashGet - {D6E814A0-E0C5-11d4-8D29-0050BA6940E3} - C:\PROGRA~1\FlashGet\flashget.exe
O16 - DPF: {39B0684F-D7BF-4743-B050-FDC3F48F7E3B} (FilePlanet Download Control Class) - http://www.fileplanet.com/fpdlmgr/cabs/FPDC_1_0_0_44.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://by24fd.bay24.hotmail.msn.com/resources/MsnPUpld.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.com/v5consumer/V5Controls/en/x86/client/wuweb_site.cab?1098621189546
O17 - HKLM\System\CCS\Services\Tcpip\..\{B3745A68-EB80-4B32-BD1E-5DB681F8618D}: NameServer = 212.27.32.176,212.27.32.177
O17 - HKLM\System\CCS\Services\Tcpip\..\{F86DF22F-3E8F-4093-9DFC-CD06CB1645B0}: NameServer = 80.118.196.42 80.118.192.112
O23 - Service: AntiVir Scheduler (AntiVirScheduler) - H+BEDV Datentechnik GmbH - C:\Program Files\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Service (AntiVirService) - H+BEDV Datentechnik GmbH - C:\Program Files\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe