Grosse lenteur

Bonjour,
Depuis quelques temps mon laptop est très lent. L'uc est souvent utilisé a 100%
Les processus que prenne le plus de mémoire sont : sttray.exe, naprdmgr.exe et svchost.exe
Je pense que mon pc est infecté mais antivirus ne trouve rien.
J'ai MCafee comme antivirus

Voici mon log hijack

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 7:47:34 PM, on 11/02/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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\spoolsv.exe
C:\Program Files\Broadcom Corporation\Broadcom USH Host Components\CV\bin\HostControlService.exe
C:\Program Files\Broadcom Corporation\Broadcom USH Host Components\CV\bin\HostStorageService.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\McAfee\Common Framework\FrameworkService.exe
C:\Program Files\McAfee\VirusScan Enterprise\Mcshield.exe
C:\Program Files\McAfee\VirusScan Enterprise\VsTskMgr.exe
C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE
C:\Program Files\OCS Inventory Agent\ocsservice.exe
C:\WINDOWS\system32\STacSV.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\RealVNC\Vnc4\winvnc4.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\sttray.exe
C:\Program Files\DellTPad\Apoint.exe
C:\WINDOWS\system32\hkcmd.exe
C:\Program Files\McAfee\Common Framework\UdaterUI.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\McAfee\Common Framework\McTray.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\3 Mobile Broadband\3 Mobile Broadband.exe
C:\Program Files\DellTPad\ApMsgFwd.exe
C:\Program Files\DellTPad\HidFind.exe
C:\Program Files\DellTPad\Apntex.exe
C:\WINDOWS\system32\NOTEPAD.EXE
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.google.fr/ie
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.google.fr
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.fr
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.google.fr/ie
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.google.fr/ie
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://www.google.fr/keyword/%s
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - c:\program files\real\realplayer\rpbrowserrecordplugin.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - C:\Program Files\McAfee\VirusScan Enterprise\scriptcl.dll
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [IDTSysTrayApp] sttray.exe
O4 - HKLM\..\Run: [Apoint] C:\Program Files\DellTPad\Apoint.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [ShStatEXE] "C:\Program Files\McAfee\VirusScan Enterprise\SHSTAT.EXE" /STANDALONE
O4 - HKLM\..\Run: [McAfeeUpdaterUI] "C:\Program Files\McAfee\Common Framework\UdaterUI.exe" /StartedFromRunKey
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Mobile Partner] C:\Program Files\3 Mobile Broadband\3 Mobile Broadband.exe
O4 - HKCU\..\RunOnce: [UniblueRegistryBooster] "C:\Program Files\Uniblue\RegistryBooster\launcher.exe" delay 20000
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [perso.cmd] c:\windows\sogeti\appli\perso.cmd (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-20\..\RunOnce: [perso.cmd] c:\windows\sogeti\appli\perso.cmd (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [^SetupICWDesktop] C:\Program Files\Internet Explorer\Connection Wizard\icwconn1.exe /desktop (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [^SetupICWDesktop] C:\Program Files\Internet Explorer\Connection Wizard\icwconn1.exe /desktop (User 'Default user')
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O9 - Extra button: SSO - {2FBE4EA9-CA44-470A-98EF-142DE942AA76} - https://sso.capgemini.com/autologon.asp?url=home.asp?sogeticontext=true (file missing)
O9 - Extra button: (no name) - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe
O9 - Extra 'Tools' menuitem: Uninstall BitDefender Online Scanner - {85d1f590-48f4-11d9-9669-0800200c9a66} - C:\WINDOWS\bdoscandel.exe
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.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
O9 - Extra button: SSO - {2FBE4EA9-CA44-470A-98EF-142DE942AA76} - https://sso.capgemini.com/autologon.asp?url=home.asp?sogeticontext=true (file missing) (HKCU)
O16 - DPF: {4871A87A-BFDD-4106-8153-FFDE2BAC2967} (DLM Control) - http://dlm.tools.akamai.com/dlmanager/versions/activex/dlm-activex-2.2.4.1.cab
O16 - DPF: {5D86DDB5-BDF9-441B-9E9E-D4730F4EE499} (BDSCANONLINE Control) - http://download.bitdefender.com/resources/scanner/sources/en/scan8/oscan8.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/...
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} (DivXBrowserPlugin Object) - http://download.divx.com/player/DivXBrowserPlugin.cab
O16 - DPF: {8100D56A-5661-482C-BEE8-AFECE305D968} (Facebook Photo Uploader 5 Control) - http://upload.facebook.com/controls/2009.07.28_v5.5.8.1/FacebookPhotoUploader55.cab
O16 - DPF: {9191F686-7F0A-441D-8A98-2FE3AC1BD913} (ActiveScan 2.0 Installer Class) - http://acs.pandasoftware.com/activescan/cabs/as2stubie.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{D2C17300-D34A-4027-AB20-998CC9EB6EF9}: NameServer = 10.176.66.71 10.188.66.103
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: SearchList = idf.fr.ad.sotranet.net,intranet.transiciel.com,sogeti-transiciel.com,capgemini.com,corp.capgemini.com,capgemini.fr,fr.sogeti.com,sogeti.com,retec.fr
O17 - HKLM\System\CS1\Services\Tcpip\..\{05FEF111-EB3F-4B89-817A-E8766A417E85}: NameServer = 208.67.222.222,208.67.20.20
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: SearchList = idf.fr.ad.sotranet.net,intranet.transiciel.com,sogeti-transiciel.com,capgemini.com,corp.capgemini.com,capgemini.fr,fr.sogeti.com,sogeti.com,retec.fr
O17 - HKLM\System\CS3\Services\Tcpip\Parameters: SearchList = idf.fr.ad.sotranet.net,intranet.transiciel.com,sogeti-transiciel.com,capgemini.com,corp.capgemini.com,capgemini.fr,fr.sogeti.com,sogeti.com,retec.fr
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: SearchList = idf.fr.ad.sotranet.net,intranet.transiciel.com,sogeti-transiciel.com,capgemini.com,corp.capgemini.com,capgemini.fr,fr.sogeti.com,sogeti.com,retec.fr
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O23 - Service: Credential Vault Host Control Service - Broadcom Corporation - C:\Program Files\Broadcom Corporation\Broadcom USH Host Components\CV\bin\HostControlService.exe
O23 - Service: Credential Vault Host Storage - Broadcom Corporation - C:\Program Files\Broadcom Corporation\Broadcom USH Host Components\CV\bin\HostStorageService.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: McAfee Framework Service (McAfeeFramework) - McAfee, Inc. - C:\Program Files\McAfee\Common Framework\FrameworkService.exe
O23 - Service: McAfee McShield (McShield) - McAfee, Inc. - C:\Program Files\McAfee\VirusScan Enterprise\Mcshield.exe
O23 - Service: McAfee Task Manager (McTaskManager) - McAfee, Inc. - C:\Program Files\McAfee\VirusScan Enterprise\VsTskMgr.exe
O23 - Service: OCS INVENTORY SERVICE (OCS INVENTORY) - http://ocsinventory.sourceforge.net - C:\Program Files\OCS Inventory Agent\ocsservice.exe
O23 - Service: Audio Service (STacSV) - IDT, Inc. - C:\WINDOWS\system32\STacSV.exe
O23 - Service: winvnc4 - RealVNC Ltd. - C:\Program Files\RealVNC\Vnc4\winvnc4.exe