[PC fails to start - requires Startup Repair which fails]

My PC upon booting requires me to Launch Startup Repair. The repair subsequently fails every time. Below is my HiJackThis Log. Any help would be greatly appreciated!

Logfile of Trend Micro HijackThis v2.0.2

Scan saved at 10:33:06 AM, on 9/16/2012

Platform: Windows Vista SP1 (WinNT 6.00.1905)

MSIE: Internet Explorer v7.00 (7.00.6001.18319)

Boot mode: Safe mode with network support

Running processes:

C:\Program Files (x86)\Mozilla Firefox\firefox.exe

C:\Program Files (x86)\Mozilla Firefox\plugin-container.exe

C:\Windows\SysWOW64\Macromed\Flash\FlashPlayerPlugin_11_4_402_265.exe

C:\Windows\SysWOW64\Macromed\Flash\FlashPlayerPlugin_11_4_402_265.exe

C:\Program Files (x86)\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell.com

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell.com

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 =

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Internet Explorer provided by Dell

R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =

O1 - Hosts: ::1 localhost

O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - c:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll

O2 - BHO: Java Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre6\bin\ssv.dll

O2 - BHO: Java Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre6\bin\jp2ssv.dll

O4 - HKLM\..\Run: [sunJavaUpdateSched] "C:\Program Files (x86)\Java\jre6\bin\jusched.exe"

O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "c:\Program Files (x86)\Adobe\Reader 9.0\Reader\Reader_sl.exe"

O4 - HKLM\..\Run: [Dell Webcam Central] "C:\Program Files (x86)\Dell Webcam\Dell Webcam Central\WebcamDell.exe" /mode2

O4 - HKLM\..\Run: [PCMService] "C:\Program Files (x86)\Dell\MediaDirect\PCMService.exe"

O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files (x86)\QuickTime\QTTask.exe" -atboottime

O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files (x86)\iTunes\iTunesHelper.exe"

O4 - HKCU\..\Run: [sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun

O4 - HKUS\S-1-5-19\..\Run: [sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'LOCAL SERVICE')

O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'LOCAL SERVICE')

O4 - HKUS\S-1-5-20\..\Run: [sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'NETWORK SERVICE')

O4 - Global Startup: QuickSet.lnk = C:\Program Files\Dell\QuickSet\quickset.exe

O9 - Extra button: Blog This - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files (x86)\Windows Live\Writer\WriterBrowserExtension.dll

O9 - Extra 'Tools' menuitem: &Blog This in Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files (x86)\Windows Live\Writer\WriterBrowserExtension.dll

O13 - Gopher Prefix:

O16 - DPF: {8100D56A-5661-482C-BEE8-AFECE305D968} (Facebook Photo Uploader 5 Control) - http://upload.facebook.com/controls/2009.07.28_v5.5.8.1/FacebookPhotoUploader55.cab

O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab

O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\SysWOW64\Macromed\Flash\FlashPlayerUpdateService.exe

O23 - Service: Andrea ST Filters Service (AESTFilters) - Unknown owner - C:\Windows\System32\DriverStore\FileRepository\stwrt64.inf_15f4e438\AESTSr64.exe (file missing)

O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)

O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe

O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files (x86)\Bonjour\mDNSResponder.exe

O23 - Service: @dfsrres.dll,-101 (DFSR) - Unknown owner - C:\Windows\system32\DFSR.exe (file missing)

O23 - Service: iPod Service - Apple Inc. - C:\Program Files (x86)\iPod\bin\iPodService.exe

O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\Windows\system32\lsass.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: @%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: Trend Micro Central Control Component (SfCtlCom) - Trend Micro Inc. - C:\Program Files\Trend Micro\Internet Security\SfCtlCom.exe

O23 - Service: @%SystemRoot%\system32\SLsvc.exe,-101 (slsvc) - Unknown owner - C:\Windows\system32\SLsvc.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: Audio Service (STacSV) - Unknown owner - C:\Windows\System32\DriverStore\FileRepository\stwrt64.inf_15f4e438\STacSV64.exe (file missing)

O23 - Service: stllssvr - MicroVision Development, Inc. - C:\Program Files (x86)\Common Files\SureThing Shared\stllssvr.exe

O23 - Service: Trend Micro Unauthorized Change Prevention Service (TMBMServer) - Trend Micro Inc. - C:\Program Files\Trend Micro\BM\TMBMSRV.exe

O23 - Service: Trend Micro Personal Firewall (TmPfw) - Trend Micro Inc. - C:\PROGRA~1\TRENDM~1\INTERN~1\TmPfw.exe

O23 - Service: Trend Micro Proxy Service (tmproxy) - Trend Micro Inc. - C:\Program Files\Trend Micro\Internet Security\TmProxy.exe

O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\Windows\system32\UI0Detect.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: Dell Wireless WLAN Tray Service (wltrysvc) - Unknown owner - C:\Windows\System32\WLTRYSVC.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 - 7545 bytes

hijackthis.log