Hi

when I try to install windows 8.1 over version 8 I get a black screen after install

I have to then force a reboot and it reverts to the previous version

in the log file it shows the following

2013-07-06 09:32:45, Error                 SP     CSetupPlatform::ResurrectNewSystem: Failure: Win32Exception: newsystem.dat: The system cannot find the file specified. [0x00000002] __cdecl UnBCL::FileStream::FileStream(const class UnBCL::String *,enum UnBCL::FileMode,enum UnBCL::FileAccess,enum UnBCL::FileShare,unsigned long)[gle=0x00000002]
2013-07-06 09:33:25, Error                 CONX   ConX::Compatibility::CCompatibilityController::GetDriverBlockType: Found more than one match for the specified device.
2013-07-06 09:33:28, Error                 CONX   ConX::Compatibility::CCompatibilityController::GetDriverBlockType: Found more than one match for the specified device.
2013-07-06 09:33:33, Error                 CONX   ConX::Compatibility::CCompatibilityController::GetDriverBlockType: Found more than one match for the specified device.
2013-07-06 09:33:33, Error                 CONX   ConX::Compatibility::CCompatibilityController::GetDriverBlockType: Found more than one match for the specified device.
2013-07-06 09:36:35, Error      [0x0808fe] MIG    Plugin {ee036dc0-f9b7-4d2d-bb94-3dd3102c5804}: BRIDGEMIG: CBrgUnattend::CollectBridgeSettings failed: 0x1, 0
2013-07-06 09:36:35, Error      [0x0808fe] MIG    Plugin {526D451C-721A-4b97-AD34-DCE5D8CD22C5}: [shmig] Failed to get preferred homegroup with hr=0x80070490
2013-07-06 09:57:38, Error                 MIG    COnlineWinNTPlatform::AddPathToSearchIndexer - Failed to create CSearchManager instance, error: 0x80070422[gle=0x000003f0]
2013-07-06 09:57:59, Error      [0x0808fe] MIG    Plugin {C939EC0F-2F56-4CE8-AF56-2336596A5FA7}: error: Failed to read a WCHAR from the ver file, hr = 0x0880070006
2013-07-06 09:58:01, Error      [0x0808fe] MIG    Plugin {ee036dc0-f9b7-4d2d-bb94-3dd3102c5804}: BRIDGEMIG: ParseRegistryIfBridgeExists: query bridge presence key failed 0x139f, bridge present = 0
2013-07-06 09:58:01, Error      [0x0808fe] MIG    Plugin {6CF7C0FC-91DD-4D47-9B6F-0769F8AE68D2}: [TpmScr] - check completion signature failed, skip this folder. file=C:\$WINDOWS.~BT\Work\MachineSpecific\Working\srcworking\agentmgr\CCSIAgent\005A9238\completed.txt
2013-07-06 09:58:01, Error      [0x08038d] MIG    Failure while calling IPostApply->ApplySuccess for Plugin={ServerPath="Microsoft-Windows-DirectoryServices-ADAM-Client\adammigrate.dll", CLSID={43CCF250-2A74-48c6-9620-FC312EC475D6}, ThreadingModel=Apartment}. Error: 0x80070002
2013-07-06 09:58:01, Error                 SP     Error READ, 0x00000002 while gathering/applying object: apply-success, Action,CMXEPlugin,C:\$WINDOWS.~BT\Sources\ReplacementManifests,Microsoft-Windows-DirectoryServices-ADAM-Client\adammigrate.dll,{43CCF250-2A74-48c6-9620-FC312EC475D6},Apartment. Will return 2[gle=0x000000cb]
2013-07-06 09:58:17, Error      [0x080390] MIG    Failure while calling IPostApply->PostApply for Plugin={ServerPath="%windir%\system32\icfupgd.dll", CLSID={2f593f80-46a4-4da9-aad8-83a71d1f4333}, ThreadingModel=Apartment}. Error: 0x800700B7
2013-07-06 09:58:17, Error                 SP     Error READ, 0x000000B7 while gathering/applying object: post-apply, Action,CMXEPlugin,C:\$WINDOWS.~BT\Work\MachineSpecific\Working\agentmgr\CCSIAgent,%windir%\system32\icfupgd.dll,{2f593f80-46a4-4da9-aad8-83a71d1f4333},Apartment. Will return 2[gle=0x000000cb]
2013-07-06 09:59:02, Error                 MIG    NetShareEnum failed
2013-07-06 10:03:22, Error                 MIG    COnlineWinNTPlatform::AddPathToSearchIndexer - Failed to create CSearchManager instance, error: 0x80070422[gle=0x000003f0]
2013-07-06 10:03:54, Error      [0x0808fe] MIG    Plugin {52776FBF-403C-49cc-b7cb-dd557f36096A}: UpdateAcl failed: 0x80070002

any ideas how to get it to install?

Thanks