Windows freeze + hijack log

Bonjour à tous
j'ai un grand de votre aide! Windows freeze après un certain temps quelque soit l'activité que je réalise (word, films, matlab...). une a une, toutes les fenètres ouvertes deviennent inaccessibles, généralement en commencant par l'explorateur windows. La souris est toujours fonctionnelle.

J'ai réalisé plusieurs scans AV, plus nettoyage avec CCleaner.
ici se trouve mon log Hijack.
merci pour votre aide!
Fracombes



Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 12:02:48 PM, on 1/7/2015
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v11.0 (11.00.9600.17496)

FIREFOX: 29.0.1 (en-US)
Boot mode: Normal

Running processes:
C:\Program Files (x86)\Microsoft Office\Office15\MsoSync.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Dell\Dell Unified Wireless Suite\DirectConnect\DCWpaSupplicant.exe
C:\Program Files\AVAST Software\Avast\AvastUI.exe
C:\Program Files\Intel\Intel(R) Rapid Storage Technology\IAStorIcon.exe
C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnui.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Users\Francois\Downloads\HijackThis-2.0.5 beta.exe

R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
O2 - BHO: Lync Click to Call BHO - {31D09BA0-12F5-4CCE-BE8A-2923E76605DA} - C:\Program Files (x86)\Microsoft Office\Office15\OCHelper.dll
O2 - BHO: URLRedirectionBHO - {B4F3A835-0E21-4959-BA22-42B3008E02FF} - C:\PROGRA~2\MICROS~1\Office15\URLREDIR.DLL
O4 - HKLM\..\Run: [AvastUI.exe] "C:\Program Files\AVAST Software\Avast\AvastUI.exe" /nogui
O4 - HKCU\..\Run: [GoogleChromeAutoLaunch_F9D74E541E130D63EFA9B254234B668B] "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --no-startup-window
O4 - HKCU\..\Run: [CCleaner Monitoring] "C:\Program Files\CCleaner\CCleaner64.exe" /MONITOR
O9 - Extra button: Lync Click to Call - {31D09BA0-12F5-4CCE-BE8A-2923E76605DA} - C:\Program Files (x86)\Microsoft Office\Office15\OCHelper.dll
O9 - Extra 'Tools' menuitem: Lync Click to Call - {31D09BA0-12F5-4CCE-BE8A-2923E76605DA} - C:\Program Files (x86)\Microsoft Office\Office15\OCHelper.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{305B1624-5A42-4D77-B91E-56C3D3DFD466}: Domain = health.ufl.edu
O17 - HKLM\System\CCS\Services\Tcpip\..\{305B1624-5A42-4D77-B91E-56C3D3DFD466}: NameServer = 159.178.61.125,159.178.81.50
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: SearchList = health.ufl.edu,nih.gov,shands.ufl.edu
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: SearchList = health.ufl.edu,nih.gov,shands.ufl.edu
O18 - Protocol: osf - {D924BDC6-C83A-4BD5-90D0-095128A113D1} - C:\Program Files (x86)\Microsoft Office\Office15\MSOSB.DLL
O18 - Filter hijack: text/xml - {807583E5-5146-11D5-A672-00B0D022E945} - C:\Program Files (x86)\Common Files\Microsoft Shared\OFFICE15\MSOXMLMF.DLL
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\SysWOW64\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: AMD External Events Utility - Unknown owner - C:\Windows\system32\atiesrxx.exe (file missing)
O23 - Service: Dell KACE Agent (AMPAgent) - Dell Inc. - C:\Program Files (x86)\Dell\KACE\AMPAgent.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.exe
O23 - Service: AvastVBox COM Service (AvastVBoxSvc) - Avast Software - C:\Program Files\AVAST Software\Avast\ng\vbox\AvastVBoxSVC.exe
O23 - Service: Intel(R) Content Protection HECI Service (cphs) - Intel Corporation - C:\Windows\SysWow64\IntelCpHeciSvc.exe
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\Windows\System32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\Windows\system32\fxssvc.exe (file missing)
O23 - Service: Foxit Cloud Safe Update Service (FoxitCloudUpdateService) - Foxit Software Inc. - C:\PROGRAM FILES (X86)\FOXIT SOFTWARE\FOXIT READER\Foxit Cloud\FCUpdateService.exe
O23 - Service: Service Google Update (gupdate) (gupdate) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: Service Google Update (gupdatem) (gupdatem) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: Intel(R) Rapid Storage Technology (IAStorDataMgrSvc) - Intel Corporation - C:\Program Files\Intel\Intel(R) Rapid Storage Technology\IAStorDataMgrSvc.exe
O23 - Service: @%SystemRoot%\system32\ieetwcollectorres.dll,-1000 (IEEtwCollectorService) - Unknown owner - C:\Windows\system32\IEEtwCollector.exe (file missing)
O23 - Service: Intel(R) Dynamic Application Loader Host Interface Service (jhi_service) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL\jhi_service.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: Intel(R) Management and Security Application Local Management Service (LMS) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\LMS\LMS.exe
O23 - Service: McAfee Framework Service (McAfeeFramework) - McAfee, Inc. - C:\Program Files (x86)\McAfee\Common Framework\FrameworkService.exe
O23 - Service: McAfee McShield (McShield) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\SystemCore\\mcshield.exe
O23 - Service: McAfee Task Manager (McTaskManager) - McAfee, Inc. - C:\Program Files (x86)\McAfee\VirusScan Enterprise\VsTskMgr.exe
O23 - Service: McAfee Validation Trust Protection Service (mfevtp) - Unknown owner - C:\Windows\system32\mfevtps.exe (file missing)
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: O2FLASH - Unknown owner - C:\Windows\system32\DRIVERS\o2flash.exe (file missing)
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\Windows\system32\locator.exe (file missing)
O23 - Service: Realtek Audio Service (RtkAudioService) - Realtek Semiconductor - C:\Program Files\Realtek\Audio\HDA\RtkAudioService64.exe
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: SafeConnect Manager (SCManager) - Impulse Point, LLC - C:\Program Files (x86)\SafeConnect\scManager.sys
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files (x86)\Skype\Updater\Updater.exe
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\Windows\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\Windows\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\Windows\system32\sppsvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\Windows\System32\vds.exe (file missing)
O23 - Service: Cisco AnyConnect Secure Mobility Agent (vpnagent) - Cisco Systems, Inc. - C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnagent.exe
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\Wat\WatUX.exe,-601 (WatAdminSvc) - Unknown owner - C:\Windows\system32\Wat\WatAdminSvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\Windows\system32\wbengine.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\Windows\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)