Trojaner-Board - Wie bekomme ich "istart.webssearches.com"wieder vom Laptop?

Hallo,
habe istart.webssearches.com auf dem Laptop und kann es nicht deinstallieren.Benutze den IE und Google Chrom.Kann die Browser zwar zurücksetzten,aber nach 3 Tagen ist die Startseite schon wieder umgestellt.
Hier das Logfile von Hijack This:
Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 21:48:01, on 20.06.2014
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v11.0 (11.00.9600.17126)
Boot mode: Normal

Running processes:
C:\Windows\PLFSetI.exe
C:\Program Files\AVAST Software\Avast\avastui.exe
C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe
C:\Program Files (x86)\TeamViewer\Version8\TeamViewer.exe
C:\Users\Salvatore\Documents\HiJackThis204.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = hxxp://istart.webssearches.com/?type=hp&ts=1401805251&from=amt&uid=ST500LM012XHN-M500MBB_S2R7J9DCB06716
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = hxxp://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = hxxp://google.de/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = hxxp://istart.webssearches.com/?type=hp&ts=1401805251&from=amt&uid=ST500LM012XHN-M500MBB_S2R7J9DCB06716
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = hxxp://istart.webssearches.com/web/?type=ds&ts=1401805251&from=amt&uid=ST500LM012XHN-M500MBB_S2R7J9DCB06716&q={searchTerms}
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = hxxp://istart.webssearches.com/web/?type=ds&ts=1401805251&from=amt&uid=ST500LM012XHN-M500MBB_S2R7J9DCB06716&q={searchTerms}
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = hxxp://istart.webssearches.com/?type=hp&ts=1401805251&from=amt&uid=ST500LM012XHN-M500MBB_S2R7J9DCB06716
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = http=127.0.0.1:8118;https=127.0.0.1:8118
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = <-loopback>
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
F2 - REG:system.ini: UserInit=userinit.exe
O2 - BHO: IETabPage Class - {3593C8B9-8E18-4B4B-B7D3-CB8BEB1AA42C} - C:\Program Files (x86)\SupTab\SupTab.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre7\bin\ssv.dll
O2 - BHO: avast! Online Security - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre7\bin\jp2ssv.dll
O4 - HKLM\..\Run: [LManager] C:\Program Files (x86)\Launch Manager\LManager.exe
O4 - HKLM\..\Run: [AvastUI.exe] "C:\Program Files\AVAST Software\Avast\AvastUI.exe" /nogui
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O20 - AppInit_DLLs: C:\PROGRA~2\SupTab\SEARCH~1.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: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.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: Google Update-Dienst (gupdate) (gupdate) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: Google Update-Dienst (gupdatem) (gupdatem) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: @%SystemRoot%\system32\ieetwcollectorres.dll,-1000 (IEEtwCollectorService) - Unknown owner - C:\Windows\system32\IEEtwCollector.exe (file missing)
O23 - Service: IePlugin Services (IePluginServices) - Cherished Technololgy LIMITED - C:\ProgramData\IePluginServices\PluginService.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
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: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\Windows\system32\nvvsvc.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: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
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: TeamViewer 8 (TeamViewer8) - TeamViewer GmbH - C:\Program Files (x86)\TeamViewer\Version8\TeamViewer_Service.exe
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: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\Windows\system32\vssvc.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)

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End of file - 6706 bytes

Vielen Dank.