Virus dans la machine - ralentissement de PC

Bonjour,

Je pense avoir été touché par un ou des virus et je ne sais pas comment m'en débarrasser.
Voici le rapport hijackthis.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 22:50:45, on 23/04/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
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\system32\ZoneLabs\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\Program Files\Avast4\aswUpdSv.exe
C:\Program Files\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\ABBYY FineReader 9.0\NetworkLicenseServer.exe
C:\Program Files\Fichiers communs\Maxtor\Schedule2\schedul2.exe
C:\WINDOWS\ATKKBService.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Avast4\ashMaiSv.exe
C:\Program Files\Avast4\ashWebSv.exe
C:\WINDOWS\system32\ntvdm.exe
C:\WINDOWS\RTHDCPL.EXE
C:\OPLIMIT\ocrawr32.exe
C:\Program Files\ASUS\GamerOSD\GamerOSD.exe
C:\PROGRA~1\Avast4\ashDisp.exe
C:\WINDOWS\System32\LVCOMSX.EXE
C:\Program Files\Logitech\Video\LogiTray.exe
C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb07.exe
C:\Program Files\Musicmatch\Musicmatch Jukebox\mmtask.exe
C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe
C:\PROGRA~1\MESSAG~1\StartMessager.exe
C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe
C:\Program Files\Maxtor\MaxBlast\MaxBlastMonitor.exe
C:\Program Files\Maxtor\MaxBlast\TimounterMonitor.exe
C:\Program Files\Fichiers communs\Maxtor\Schedule2\schedhlp.exe
C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe
C:\WINDOWS\system32\rmctrl.exe
C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Program Files\Druide\Antidote\Gestionnaire Antidote.exe
C:\Program Files\Logitech\Video\FxSvr2.exe
C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
C:\Program Files\Orange\Logiciel de Synchronisation Orange\Voxsync.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Orange\Logiciel de Synchronisation Orange\SyncManager.exe
C:\Documents and Settings\Mathieu\Mes documents\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.orange.fr/portail
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.update.microsoft.com/windowsupdate/v6/default.aspx
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: Yahoo! Toolbar avec bloqueur de fenêtres pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
F3 - REG:win.ini: load=C:\OPLIMIT\ocraware.exe
O3 - Toolbar: VMN Toolbar - {4E7BD74F-2B8D-469E-8DA9-FD60BB9AAE33} - C:\PROGRA~1\VMNTOO~1\VMNTOO~1.DLL
O4 - HKLM\..\Run: [SkyTel] SkyTel.EXE
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [JMB36X IDE Setup] C:\WINDOWS\JM\JMInsIDE.exe
O4 - HKLM\..\Run: [JMB36X Configure] C:\WINDOWS\System32\JMRaidSetup.exe boot
O4 - HKLM\..\Run: [ASUSGamerOSD] C:\Program Files\ASUS\GamerOSD\GamerOSD.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\System32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechVideoRepair] C:\Program Files\Logitech\Video\ISStart.exe
O4 - HKLM\..\Run: [LogitechVideoTray] C:\Program Files\Logitech\Video\LogiTray.exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb07.exe
O4 - HKLM\..\Run: [mmtask] "C:\Program Files\Musicmatch\Musicmatch Jukebox\mmtask.exe"
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\FICHIE~1\INSTAL~1\UPDATE~1\ISUSPM.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [MessagerStarter Wanadoo] C:\PROGRA~1\MESSAG~1\StartMessager.exe Messager Wanadoo
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_05\bin\jusched.exe"
O4 - HKLM\..\Run: [MaxBlastMonitor.exe] C:\Program Files\Maxtor\MaxBlast\MaxBlastMonitor.exe
O4 - HKLM\..\Run: [AcronisTimounterMonitor] C:\Program Files\Maxtor\MaxBlast\TimounterMonitor.exe
O4 - HKLM\..\Run: [Acronis Scheduler2 Service] "C:\Program Files\Fichiers communs\Maxtor\Schedule2\schedhlp.exe"
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [RemoteControl] C:\WINDOWS\system32\rmctrl.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [ZoneAlarm Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [382e2bcd] rundll32.exe "C:\WINDOWS\system32\qjgknvdv.dll",b
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [Gestionnaire Antidote.exe] C:\Program Files\Druide\Antidote\Gestionnaire Antidote.exe
O4 - HKLM\..\Policies\Explorer\Run: [w1USaOIyNS] C:\Documents and Settings\All Users\Application Data\xwrqteri\byzozwze.exe
O4 - HKCU\..\Policies\Explorer\Run: [w1USaOIyNS] C:\Documents and Settings\All Users\Application Data\xwrqteri\byzozwze.exe
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Program Files\Fichiers communs\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: DSLMON.lnk = C:\Program Files\SAGEM\SAGEM F@st 800-840\dslmon.exe
O4 - Global Startup: Logiciel de Synchronisation Orange.lnk = ?
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\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.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
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Service de licence ABBYY FineReader 9.0 (ABBYY.Licensing.FineReader.Professional.9.0) - ABBYY (BIT Software) - C:\Program Files\ABBYY FineReader 9.0\NetworkLicenseServer.exe
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Acronis - C:\Program Files\Fichiers communs\Maxtor\Schedule2\schedul2.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Avast4\aswUpdSv.exe
O23 - Service: ATK Keyboard Service (ATKKeyboardService) - ASUSTeK COMPUTER INC. - C:\WINDOWS\ATKKBService.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Avast4\ashWebSv.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Fichiers communs\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe