Salut tout le monde, de puis quelques temps, quand mon PC démarre le processus explorer.exe ne s'ouvre pas automatiquement je suis obligé d l'ouvrir manuellement via le gestionnaire des tâche; certaines personne m'ont dit que ça puvait être le signe d'un virus, c'est pourquoi je fais appel à vous 
J'ai fait un scan Hijackthis:
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 23:31:42, on 31/08/2009
Platform: Windows Vista SP2 (WinNT 6.00.1906)
MSIE: Internet Explorer v8.00 (8.00.6001.18813)
Boot mode: Normal
Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskeng.exe
C:\Program Files\Dell\DellDock\DellDock.exe
C:\Windows\system32\conime.exe
C:\Windows\explorer.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\DellTPad\Apoint.exe
C:\Windows\OEM02Mon.exe
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\IAAnotif.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\Program Files\Dell\MediaDirect\PCMService.exe
C:\Program Files\Alwil Software\Avast4\ashDisp.exe
C:\Program Files\Sigmatel\C-Major Audio\WDM\sttray.exe
C:\Program Files\Dell Support Center\bin\sprtcmd.exe
C:\Windows\System32\p2phost.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Windows\ehome\ehtray.exe
C:\Users\CyTRiK\Program Files\DNA\btdna.exe
C:\Program Files\AIM6\aim6.exe
C:\Users\CyTRiK\AppData\Roaming\Octoshape\Octoshap
e Streaming Services\OctoshapeClient.exe
C:\Program Files\Protector Suite QL\psqltray.exe
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Program Files\Dell\QuickSet\quickset.exe
C:\Users\CyTRiK\AppData\Roaming\Microsoft\Notifica
tion de cadeaux MSN\lsnfier.exe
C:\Program Files\Microsoft Office\Office12\ONENOTEM.EXE
C:\Windows\ehome\ehmsas.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
c:\Program Files\WIDCOMM\Bluetooth Software\BtStackServer.exe
C:\Program Files\DellTPad\ApMsgFwd.exe
C:\Program Files\DellTPad\Apntex.exe
C:\Program Files\DellTPad\HidFind.exe
C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
C:\Program Files\AIM6\aolsoftware.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Google\Google Toolbar\GoogleToolbarUser_32.exe
C:\Program Files\Windows Live\Toolbar\wltuser.exe
C:\Windows\system32\Macromed\Flash\FlashUtil10c.ex
e
C:\Program Files\Windows Media Player\wmplayer.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Users\CyTRiK\Downloads\HiJackThis.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Windows\system32\SearchProtocolHost.exe
C:\Windows\system32\SearchFilterHost.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
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
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: (no name) - - (no file)
F2 - REG:system.ini: Shell=Explorer.exe C:\WINDOWS\Config\csrss.exe
O1 - Hosts: ::1 localhost
O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - C:\Program Files\Microsoft\Search Enhancement Pack\Search Helper\SEPsearchhelperie.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_07\bin\ssv.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: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program
Files\Google\GoogleToolbarNotifier\5.2.4204.1700\s
wg.dll
O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Program Files\Google\Google
Toolbar\Component\fastsearch_B7C5AC242193BB3E.dll
O2 - BHO: Browser Address Error Redirector - {CA6319C0-31B7-401E-A518-A07C3DB8F777} - C:\Program Files\Dell\BAE\BAE.dll
O2 - BHO: Windows Live Toolbar Helper - {E15A8DC0-8516-42A1-81EA-DC94EC1ACF10} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O3 - Toolbar: &Windows Live Toolbar - {21FA44EF-376D-4D53-9B0F-8A89D3229068} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [ECenter] C:\Dell\E-Center\EULALauncher.exe
O4 - HKLM\..\Run: [Apoint] C:\Program Files\DellTPad\Apoint.exe
O4 - HKLM\..\Run: [OEM02Mon.exe] C:\Windows\OEM02Mon.exe
O4 - HKLM\..\Run: [NvSvc] RUNDLL32.EXE C:\Windows\system32\nvsvc.dll,nvsvcStart
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\Windows\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [NVHotkey] rundll32.exe C:\Windows\system32\nvHotkey.dll,Start
O4 - HKLM\..\Run: [PSQLLauncher] "C:\Program Files\Protector Suite QL\launcher.exe" /startup
O4 - HKLM\..\Run: [IAAnotif] "C:\Program Files\Intel\Intel Matrix Storage Manager\Iaanotif.exe"
O4 - HKLM\..\Run: [Google Desktop Search] "C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe" /startup
O4 - HKLM\..\Run: [dscactivate] "C:\Program Files\Dell Support Center\gs_agent\custom\dsca.exe"
O4 - HKLM\..\Run: [PCMService] "C:\Program Files\Dell\MediaDirect\PCMService.exe"
O4 - HKLM\..\Run: [DellSupportCenter] "C:\Program Files\Dell Support Center\bin\sprtcmd.exe" /P DellSupportCenter
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [AdobeCS4ServiceManager] "C:\Program Files\Common
Files\Adobe\CS4ServiceManager\CS4ServiceManager.ex
e" -launchedbylogin
O4 - HKLM\..\Run: [SigmatelSysTrayApp] %ProgramFiles%\SigmaTel\C-Major Audio\WDM\sttray.exe
O4 - HKCU\..\Run: [DellSupportCenter] "C:\Program Files\Dell Support Center\bin\sprtcmd.exe" /P DellSupportCenter
O4 - HKCU\..\Run: [CollaborationHost] C:\Windows\system32\p2phost.exe -s
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [swg] C:\Program
Files\Google\GoogleToolbarNotifier\GoogleToolbarNo
tifier.exe
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [BitTorrent DNA] "C:\Users\CyTRiK\Program Files\DNA\btdna.exe"
O4 - HKCU\..\Run: [Aim6] "C:\Program Files\AIM6\aim6.exe" /d locale=en-US ee://aol/imApp
O4 - HKCU\..\Run: [Octoshape Streaming Services]
"C:\Users\CyTRiK\AppData\Roaming\Octoshape\Octosha
pe Streaming Services\OctoshapeClient.exe" -inv:bootrun
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'SERVICE RÉSEAU')
O4 - Startup: Dell Dock.lnk = C:\Program Files\Dell\DellDock\DellDock.exe
O4 - Startup: Notification de cadeaux MSN.lnk =
C:\Users\CyTRiK\AppData\Roaming\Microsoft\Notifica
tion de cadeaux MSN\lsnfier.exe
O4 - Startup: OneNote 2007 - Capture d'écran et lancement.lnk = C:\Program Files\Microsoft Office\Office12\ONENOTEM.EXE
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: QuickSet.lnk = C:\Program Files\Dell\QuickSet\quickset.exe
O8 - Extra context menu item: Ajouter la cible du lien à un fichier PDF existant - res://C:\Program Files\Common
Files\Adobe\Acrobat\ActiveX\AcroIEFavClient.dll/Ac
roIEAppendSelLinks.html
O8 - Extra context menu item: Ajouter à un fichier PDF existant - res://C:\Program Files\Common
Files\Adobe\Acrobat\ActiveX\AcroIEFavClient.dll/Ac
roIEAppend.html
O8 - Extra context menu item: Convertir au format Adobe PDF - res://C:\Program Files\Common
Files\Adobe\Acrobat\ActiveX\AcroIEFavClient.dll/Ac
roIECapture.html
O8 - Extra context menu item: Convertir la cible du lien au format Adobe PDF - res://C:\Program Files\Common
Files\Adobe\Acrobat\ActiveX\AcroIEFavClient.dll/Ac
roIECaptureSelLinks.html
O8 - Extra context menu item: E&xporter vers Microsoft Excel -
res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Envoyer au périphérique &Bluetooth... - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O8 - Extra context menu item: Envoyer l'&image au périphérique Bluetooth... - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O8 - Extra context menu item: Télécharger avec &BitSpirit - C:\Program Files\BitSpirit\bsurl.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\PROGRA~1\Java\JRE16~1.0_0\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\PROGRA~1\Java\JRE16~1.0_0\bin\ssv.dll
O9 - Extra button: Ajout Direct - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: &Ajout Direct dans Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Envoyer à OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: @btrez.dll,-4015 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra 'Tools' menuitem: @btrez.dll,-12650 - {CCA281CA-C863-46ef-9331-5C8D4460577F} - c:\Program Files\WIDCOMM\Bluetooth Software\btsendto_ie.htm
O9 - Extra button: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} - C:\Program Files\ICQ6\ICQ.exe
O9 - Extra 'Tools' menuitem: ICQ6 - {E59EB121-F339-4851-A3BA-FE49C35617C2} - C:\Program Files\ICQ6\ICQ.exe
O13 - Gopher Prefix:
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.ccom/NOS/getPlusPlus/1.6/gp.cab
O20 - AppInit_DLLs: C:\PROGRA~1\Google\GOOGLE~2\GOEC62~1.DLL
O20 - Winlogon Notify: GoToAssist - C:\Program Files\Citrix\GoToAssist\514\G2AWinLogon.dll
O23 - Service: Andrea ST Filters Service (AESTFilters) - Andrea Electronics Corporation - C:\Windows\system32\aestsrv.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Dock Login Service (DockLoginService) - Stardock Corporation - C:\Program Files\Dell\DellDock\DockLogin.exe
O23 - Service: Intel(R) PROSet/Wireless Event Log (EvtEng) - Intel Corporation - C:\Program Files\Intel\Wireless\Bin\EvtEng.exe
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Google Desktop Manager 5.7.801.7324 (GoogleDesktopManager-010708-104812) - Google - C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
O23 - Service: GoToAssist - Citrix Online, a division of Citrix Systems, Inc. - C:\Program Files\Citrix\GoToAssist\514\g2aservice.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\Iaantmon.exe
O23 - Service: Intel(R) PROSet/Wireless Registry Service (RegSrvc) - Intel Corporation - C:\Program Files\Intel\Wireless\Bin\RegSrvc.exe
O23 - Service: SupportSoft Sprocket Service (dellsupportcenter) (sprtsvc_dellsupportcenter) - SupportSoft, Inc. - C:\Program Files\Dell Support Center\bin\sprtsvc.exe
O23 - Service: SigmaTel Audio Service (STacSV) - IDT, Inc. - C:\Windows\system32\STacSV.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe
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