Mon premier svchost

Bonjour, je suis infecté et svchost me crée des ennuis j'ai scanné mon Pc avec Hijackthis voici le rapport
Logfile of HijackThis v1.99.1
Scan saved at 19:08:50, on 16/09/2006
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\spoolsv.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\ATI-CPanel\atiptaxx.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Google\GoogleToolbarNotifier\1.0.720.3640\GoogleToolbarNotifier.exe
C:\Program Files\MSI\BToes Logiciel Bluetooth\BTTray.exe
C:\Program Files\MSI\BToes Logiciel Bluetooth\bin\btwdins.exe
C:\WINDOWS\system32\slserv.exe
C:\WINDOWS\system32\ZoneLabs\vsmon.exe
C:\PROGRA~1\ZONELA~1\ZONEAL~1\MAILFR~1\mantispm.exe
C:\WINDOWS\System32\ZoneLabs\isafe.exe
C:\WINDOWS\System32\wuauclt.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Hijackthis Version Française\VERSION TRADUITE ORIGINALE.EXE

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://portail.free.fr/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Alice ADSL
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {1da7dbe8-c51b-4ae4-bc6e-21863349b0b4} - C:\Program Files\IntCodec\isaddon.dll (file missing)
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM\..\Run: [ATIPTA] C:\ATI-CPanel\atiptaxx.exe
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\System32\\NeroCheck.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [Zone Labs Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\1.0.720.3640\GoogleToolbarNotifier.exe
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: Envoyer à &Bluetooth - C:\Program Files\MSI\BToes Logiciel Bluetooth\btsendto_ie_ctx.htm
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\MSI\BToes Logiciel Bluetooth\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-4017 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - C:\Program Files\MSI\BToes Logiciel Bluetooth\btsendto_ie.htm
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\System32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\MSI\BToes Logiciel Bluetooth\bin\btwdins.exe
O23 - Service: CA ISafe (CAISafe) - Computer Associates International, Inc. - C:\WINDOWS\System32\ZoneLabs\isafe.exe
O23 - Service: SmartLinkService (SLService) - - C:\WINDOWS\SYSTEM32\slserv.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe

Merci de bien vouloir m'aider, je suis un néophite.