Trojan svchost.exe ?

Bonjour,
on m'a demander mon message précédent ici.
Le problème que qu'un message apparait à répétition sur mon ecran :

L'instruction à "0x75586eb5" emploie l'adresse mémoire "0x00000008". La mémoire ne peut pas être "read".

Cliquez sur OK pour terminer le programme.

A chaque fois que je clique sur OK une partie d'affichage de mon ordi change ( barre de démarage, barre d'état...). Si je ne clique pas, l'ordi se bloque.
Je pense que celà est du à un trojan, vu mon manque de vigilance ces derniers temps sur le net.
Parfois le message change et indique d'autres instructions et d'autres adresses mémoires; par exemple:

L'instruction à "0x755cd383" emploie l'adresse mémoire "0x00000060". La mémoire ne peut pas être "read".

Cliquez sur OK pour terminer le programme.

J'ai effectué l'analyse Hijackthis suivante:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:27:45, on 17/03/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16791)
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Fichiers communs\Acronis\Schedule2\schedul2.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\WINDOWS\system32\cisvc.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\System32\svchost.exe
M:\Downloads\CDBurnerXP\NMSAccessU.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\ALCWZRD.EXE
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\WINDOWS\PixArt\PAC7311\Monitor.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Search Settings\SearchSettings.exe
C:\Program Files\Acronis\TrueImageHome\TrueImageMonitor.exe
C:\Program Files\Acronis\TrueImageHome\TimounterMonitor.exe
C:\Program Files\Fichiers communs\Acronis\Schedule2\schedhlp.exe
C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe
C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
C:\WINDOWS\system32\msupdate.exe
C:\Program Files\Fichiers communs\LightScribe\LightScribeControlPanel.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\OpenOffice.org 3\program\soffice.exe
C:\Program Files\OpenOffice.org 3\program\soffice.bin
C:\WINDOWS\system32\cidaemon.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\svchost.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.google.com/toolbar/ie8/sidebar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.google.com/?gws_rd=ssl
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
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 Bar = https://www.bing.com/?toHttps=1&redig=8F3F334EA60E4B1CB4D040DCFE393A89{SUB_RFC1766}/srchasst/srchasst.htm
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
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.google.com/toolbar/ie8/sidebar.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Search,Default_Search_URL = http://www.google.com/toolbar/ie8/sidebar.html
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://www.google.fr/toolbar/ie8/sidebar.html
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://www.google.com/search?q=%s
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: SearchSettings Class - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Search Settings\kb127\SearchSettings.dll
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Skype add-on (mastermind) - {22BF413B-C6D2-4d91-82A9-A0F997BA588C} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O2 - BHO: IEVkbdBHO - {59273AB4-E7D3-40F9-A1A8-6FA9CCA1862C} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\ievkbd.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre6\bin\ssv.dll
O2 - BHO: Programme d'aide de l'Assistant de connexion Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Fichiers communs\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.0.926.3450\swg.dll
O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Program Files\Google\Google Toolbar\Component\fastsearch_219B3E1547538286.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: SearchSettings Class - {E312764E-7706-43F1-8DAB-FCDD2B1E416D} - C:\Program Files\Search Settings\kb127\SearchSettings.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O3 - Toolbar: DAEMON Tools Toolbar - {32099AAC-C132-4136-9E9A-4E364A424E17} - C:\Program Files\DAEMON Tools Toolbar\DTToolbar.dll
O3 - Toolbar: &Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar.dll
O4 - HKLM\..\Run: [Raccourci vers la page des propriétés de High Definition Audio] HDAudPropShortcut.exe
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [AlcWzrd] ALCWZRD.EXE
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [PAC7311_Monitor] C:\WINDOWS\PixArt\PAC7311\Monitor.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [SearchSettings] C:\Program Files\Search Settings\SearchSettings.exe
O4 - HKLM\..\Run: [TrueImageMonitor.exe] C:\Program Files\Acronis\TrueImageHome\TrueImageMonitor.exe
O4 - HKLM\..\Run: [AcronisTimounterMonitor] C:\Program Files\Acronis\TrueImageHome\TimounterMonitor.exe
O4 - HKLM\..\Run: [Acronis Scheduler2 Service] "C:\Program Files\Fichiers communs\Acronis\Schedule2\schedhlp.exe"
O4 - HKLM\..\Run: [DSLAGENTEXE] dslagent.exe
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [DNS7reminder] "C:\Program Files\Nuance\NaturallySpeaking9\Ereg\Ereg.exe" -r "C:\Documents and Settings\All Users\Application Data\Nuance\NaturallySpeaking9\Ereg.ini
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\FICHIE~1\INSTAL~1\UPDATE~1\ISUSPM.exe -startup
O4 - HKLM\..\Run: [HP Software Update] C:\Program Files\HP\HP Software Update\HPWuSchd2.exe
O4 - HKLM\..\Run: [SSBkgdUpdate] "C:\Program Files\Fichiers communs\Scansoft Shared\SSBkgdUpdate\SSBkgdupdate.exe" -Embedding -boot
O4 - HKLM\..\Run: [face bin load show] C:\Documents and Settings\All Users\Application Data\title tool face bin\Up Two.exe
O4 - HKLM\..\Run: [ZoneAlarm Client] "C:\Program Files\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Windows Service] service.exe
O4 - HKLM\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe"
O4 - HKLM\..\Run: [AdobeCS4ServiceManager] "C:\Program Files\Fichiers communs\Adobe\CS4ServiceManager\CS4ServiceManager.exe" -launchedbylogin
O4 - HKLM\..\Run: [DRam prosessor] msupdate.exe
O4 - HKLM\..\Run: [AVP] "C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\avp.exe"
O4 - HKLM\..\RunServices: [DRam prosessor] msupdate.exe
O4 - HKCU\..\Run: [LightScribe Control Panel] C:\Program Files\Fichiers communs\LightScribe\LightScribeControlPanel.exe -hidden
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Fichiers communs\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Steam] "m:\program files\steam\steam.exe" -silent
O4 - HKCU\..\Run: [xizdv] "c:\documents and settings\frédéric\local settings\application data\xizdv.exe" xizdv
O4 - HKCU\..\Run: [connectiv32] C:\backup\connectiv32.exe
O4 - HKCU\..\Run: [MessengerPlus3] "C:\Program Files\MessengerPlus! 3\MsgPlus.exe" /WinStart
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized
O4 - HKUS\S-1-5-19\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [nlsf] cmd.exe /C move /Y "%SystemRoot%\System32\syssetub.dll" "%SystemRoot%\System32\syssetup.dll" (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [tscuninstall] %systemroot%\system32\tscupgrd.exe (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [Config] %systemroot%\system32\run.cmd (User 'Default user')
O4 - Startup: IMVU.lnk = C:\Program Files\IMVU\IMVUClient.exe
O4 - Startup: OpenOffice.org 3.0.lnk = C:\Program Files\OpenOffice.org 3\program\quickstart.exe
O7 - HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
O8 - Extra context menu item: Compare Prices with &Dealio - C:\Documents and Settings\Frédéric\Application Data\Dealio\kb127\res\DealioSearch.html
O9 - Extra button: Statistiques de la protection du trafic Internet - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\SCIEPlgn.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: Skype - {77BF5300-1474-4EC7-9980-D32B190E9B07} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.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: 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
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
O15 - ESC Trusted Zone: http://*.update.microsoft.com
O16 - DPF: {09C21411-B9A2-4DE6-8416-4E3B58577BE0} (France Telecom MDM ActiveX Control) - http://minitelweb.minitel.com/imin_data/ocx/MDM.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Program Files\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {5C051655-FCD5-4969-9182-770EA5AA5565} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab56986.cab
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/FR-FR/a-UNO1/GAME_UNO1.cab
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} (DivXBrowserPlugin Object) - http://download.divx.com/player/DivXBrowserPlugin.cab
O16 - DPF: {8AD9C840-044E-11D1-B3E9-00805F499D93} (Java Runtime Environment 1.6.0) - http://dl8-cdn-01.sun.com/s/ESD5/JSCDL/jre/6u11-b90/jinstall-6u11-windows-i586-jc.cab?e=1231581367014&h=62ac6819e22301cb7dd1eff67d3ad130/&filename=jinstall-6u11-windows-i586-jc.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {D8AA889B-2C65-47C3-8C16-3DCD4EF76A47} (Invoke Solutions Participant Control(MR)) - http://rms2.invokesolutions.com/events/bin/6.2.0.1450/MILive.cab
O16 - DPF: {F5A7706B-B9C0-4C89-A715-7A0C6B05DD48} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary/MineSweeper.cab56986.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{15E754AB-1B27-4D0E-88F4-B4C4E8A70C59}: NameServer = 85.255.112.78,85.255.112.12
O17 - HKLM\System\CS1\Services\Tcpip\..\{15E754AB-1B27-4D0E-88F4-B4C4E8A70C59}: NameServer = 85.255.112.78,85.255.112.12
O17 - HKLM\System\CS3\Services\Tcpip\..\{15E754AB-1B27-4D0E-88F4-B4C4E8A70C59}: NameServer = 85.255.112.78,85.255.112.12
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\FICHIE~1\Skype\SKYPE4~1.DLL
O20 - AppInit_DLLs: C:\PROGRA~1\KASPER~1\KASPER~1\mzvkbd.dll,C:\PROGRA~1\KASPER~1\KASPER~1\mzvkbd3.dll,C:\PROGRA~1\KASPER~1\KASPER~1\adialhk.dll,C:\PROGRA~1\KASPER~1\KASPER~1\kloehk.dll
O20 - Winlogon Notify: !SASWinLogon - C:\Program Files\SUPERAntiSpyware\SASWINLO.dll (file missing)
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Acronis - C:\Program Files\Fichiers communs\Acronis\Schedule2\schedul2.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
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: Kaspersky Internet Security (AVP) - Kaspersky Lab - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\avp.exe
O23 - Service: Droppix Service - Droppix - C:\Program Files\Fichiers communs\Droppix\DxService.exe
O23 - Service: Firebird Server - MAGIX Instance (FirebirdServerMAGIXInstance) - Unknown owner - C:\Program Files\MAGIX\Common\Database\bin\fbserver.exe (file missing)
O23 - Service: FLEXnet Licensing Service - Acresso Software Inc. - C:\Program Files\Fichiers communs\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: Google Software Updater (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: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: LVSrvLauncher - Logitech Inc. - C:\Program Files\Fichiers communs\LogiShrd\SrvLnch\SrvLnch.exe
O23 - Service: NMSAccessU - Unknown owner - M:\Downloads\CDBurnerXP\NMSAccessU.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Unknown owner - C:\WINDOWS\system32\ZoneLabs\vsmon.exe (file missing)