Hi!!! I'm running Windows 7 Home premium. Just a while ago I downloaded an .exe file. When I ran it, nothing happened and it suddenly disappeared from my desktop. After a while a flag of messages in my task bar appeared, saying that Windows Security Center was turned off. I tried to turn it on, but a message saying "The Windows Security Center service can't be started" appeared. Every Antivirus and security program has been turned off now. I also tried to do a restore, but the restore service was also disabled. Also whenever i try to open some link, it will open some other tabs or Popup kind of things. This is my HiJack This Log Logfile of Trend Micro HijackThis v2.0.4 Scan saved at 3:18:40 AM, on 29-Dec-12 Platform: Windows 7 (WinNT 6.00.3504) MSIE: Internet Explorer v8.00 (8.00.7600.16385) Boot mode: Normal Running processes: C:\ProgramData\DatacardService\DCSHelper.exe C:\Program Files (x86)\DAP\DAP.exe C:\ProgramData\Macrovision\FLEXnet Connect\6\ISUSPM.exe C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch Buttons\QLBCtrl.exe C:\Program Files (x86)\HP\QuickPlay\QPService.exe C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch\HPMSGSVC.exe C:\Program Files (x86)\PowerISO\PWRISOVM.EXE C:\Users\ANKIT\Desktop\hjsplit.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:\Users\ANKIT\Downloads\HijackThis.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 R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank 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://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://home.sweetim.com/?crg=3.1010000.10011&barid={B3AC4354-33CA-11E2-BF65-001E68C3E00B} R1 - HKCU\Software\Microsoft\Internet Explorer\Search,Default_Search_URL = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= R1 - HKLM\Software\Microsoft\Internet Explorer\Search,Default_Search_URL = http://search.certified-toolbar.com?si=41460&tid=2937&bs=true&q= 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 R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = F2 - REG:system.ini: UserInit=userinit.exe O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll O2 - BHO: SearchPredictObj Class - {389943B0-C3A2-4E69-82CB-8596A84CB3DC} - C:\Program Files (x86)\SearchPredict\SearchPredict.dll O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\Program Files (x86)\Microsoft Office\Office12\GrooveShellExtensions.dll O2 - BHO: SBCONVERT - {92A9ACF4-9333-43AE-9698-DB283326F87F} - C:\Program Files (x86)\SPEEDbit Video Downloader\Toolbar\tbcore3.dll O2 - BHO: LinkVerifierBHO - {D5974A72-C81C-4DC3-BE77-A8A7BBC8864E} - C:\Program Files (x86)\DAP\LinkVerifier.dll O2 - BHO: GrabberObj Class - {FF7C3CF0-4B15-11D1-ABED-709549C10000} - C:\Program Files (x86)\SPEEDbit Video Downloader\Toolbar\grabber.dll O3 - Toolbar: SpeedBit Video Downloader - {0329E7D6-6F54-462D-93F6-F5C3118BADF2} - C:\Program Files (x86)\SPEEDbit Video Downloader\Toolbar\tbcore3.dll O4 - HKLM\..\Run: [uCam_Menu] "C:\Program Files (x86)\CyberLink\YouCam\MUITransfer\MUIStartMenu.exe" "C:\Program Files (x86)\CyberLink\YouCam" update "Software\CyberLink\YouCam\1.0" O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe" O4 - HKLM\..\Run: [GrooveMonitor] "C:\Program Files (x86)\Microsoft Office\Office12\GrooveMonitor.exe" O4 - HKLM\..\Run: [QlbCtrl.exe] C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch Buttons\QlbCtrl.exe /Start O4 - HKLM\..\Run: [QPService] "C:\Program Files (x86)\HP\QuickPlay\QPService.exe" O4 - HKLM\..\Run: [HP Quick Launch] C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch\HPMSGSVC.exe O4 - HKLM\..\Run: [sweetpacks Communicator] C:\Program Files (x86)\SweetIM\Communicator\SweetPacksUpdateManager.exe O4 - HKLM\..\Run: [PWRISOVM.EXE] C:\Program Files (x86)\PowerISO\PWRISOVM.EXE O4 - HKCU\..\Run: [DownloadAccelerator] "C:\Program Files (x86)\DAP\DAP.EXE" /STARTUP O4 - HKCU\..\Run: [iSUSPM] "C:\ProgramData\Macrovision\FLEXnet Connect\6\ISUSPM.exe" -scheduler O4 - HKCU\..\Run: [Facebook Update] "C:\Users\ANKIT\AppData\Local\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver O4 - HKCU\..\Run: [Google Update] "C:\Users\ANKIT\AppData\Local\Google\Update\GoogleUpdate.exe" /c O4 - HKCU\..\Run: [sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun O4 - Startup: Recorte de pantalla e Inicio rápido de OneNote 2007.lnk = C:\Program Files (x86)\Microsoft Office\Office12\ONENOTEM.EXE O8 - Extra context menu item: &Download with &DAP - C:\Program Files (x86)\DAP\dapextie.htm O8 - Extra context menu item: &Verify with DAP - C:\Program Files (x86)\DAP\dapverify.htm O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\Windows\system32\GPhotos.scr/200 O8 - Extra context menu item: Download &all with DAP - C:\Program Files (x86)\DAP\dapextie2.htm O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~2\MICROS~2\Office10\EXCEL.EXE/3000 O8 - Extra context menu item: E&xportar a Microsoft Excel - res://C:\PROGRA~2\MICROS~2\Office12\EXCEL.EXE/3000 O9 - Extra button: Enviar a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~2\MICROS~2\Office12\ONBttnIE.dll O9 - Extra 'Tools' menuitem: &Enviar a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~2\MICROS~2\Office12\ONBttnIE.dll O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~2\MICROS~2\Office12\REFIEBAR.DLL O16 - DPF: {74DBCB52-F298-4110-951D-AD2FF67BC8AB} (NVIDIA Smart Scan) - http://www.nvidia.com/content/DriverDownload/nforce/NvidiaSmartScan.cab O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/flashplayer/current/swflash.cab O17 - HKLM\System\CCS\Services\Tcpip\..\{5C46E40E-DBAF-469C-B949-CD693DE990B5}: NameServer = 121.242.190.181 121.242.190.210 O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\Program Files (x86)\Microsoft Office\Office12\GrooveSystemServices.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: Com4QLBEx - Hewlett-Packard Development Company, L.P. - C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch Buttons\Com4QLBEx.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 Service (gupdate) (gupdate) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe O23 - Service: Google Update Service (gupdatem) (gupdatem) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files (x86)\Google\Common\Google Updater\GoogleUpdaterService.exe O23 - Service: hpqwmiex - Hewlett-Packard Development Company, L.P. - C:\Program Files (x86)\Hewlett-Packard\Shared\hpqwmiex.exe O23 - Service: HPWMISVC - Hewlett-Packard Development Company, L.P. - C:\Program Files (x86)\Hewlett-Packard\HP Quick Launch\HPWMISVC.exe O23 - Service: HWDeviceService64.exe - Unknown owner - C:\ProgramData\DatacardService\HWDeviceService64.exe O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files (x86)\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.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: Nalpeiron Licensing Service (nlsX86cc) - Nalpeiron Ltd. - C:\Windows\SysWOW64\nlssrv32.exe O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\Windows\system32\nvvsvc.exe (file missing) O23 - Service: NVIDIA Update Service Daemon (nvUpdatusService) - NVIDIA Corporation - C:\Program Files (x86)\NVIDIA Corporation\NVIDIA Update Core\daemonu.exe O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing) O23 - Service: QuickPlay Background Capture Service (QBCS) (QPCapSvc) - Unknown owner - C:\Program Files (x86)\HP\QuickPlay\Kernel\TV\QPCapSvc.exe O23 - Service: QuickPlay Task Scheduler (QTS) (QPSched) - Unknown owner - C:\Program Files (x86)\HP\QuickPlay\Kernel\TV\QPSched.exe 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: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.exe (file missing) O23 - Service: Credential Manager (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\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) -- End of file - 11756 bytes Also there is some quick message whenever i started the scan with HijackThis which says: For some reason your system denied write access to the Hosts file. If any hijacked domains are in this file, Hijack This may NOT be able to fix this. If that happens, you need to edit the file yourself. To do this, click Start, Run and type: notepad C:\Windows\System32\drivers\etc\hosts and press Enter. Find the line(s) HijackThis reports and delete them. Save the file as 'hosts' (with quotes), and reboot. For Vista: simply, exit HijackThis, right click on the HijackThis icon, choose 'Run as administrator'. Please help me out with this issue..!!!