Windows 8.1 Install Error 0xC1900101-0x20017

Did you do the PC Reset?

Did you uninstall third-party anti-virus software?

Have you temporarily disabled Windows Firewall and Windows Defender?

Run the upgrade assistant. 

http://windows.microsoft.com/en-us/windows-8/upgrade-assistant-download-online-faq

Or,

Scan the image to check for corruption

Open Command Prompt with elevated privileges

Type:  Dism /Online /Cleanup-Image /ScanHealth

Press Enter

Check the image to see whether any corruption has been detected

Type:  Dism /Online /Cleanup-Image /CheckHealth

Press Enter

If you bought a Windows 8.1 or Windows 8 product key, you can download and install Windows from this page. You'll have the option to install Windows now, later, or using media with an ISO file.

http://windows.microsoft.com/en-US/windows-8/upgrade-product-key-only

Ok after disk cleanup I and rerunning the install and getting the same error I found this at the end of the log

2013-10-20 10:37:42, Info                  MOUPG  A previous StudyID was [not restored]

2013-10-20 10:37:42, Info                  MOUPG  SetupManager::Execute called

2013-10-20 10:37:42, Info                  MOUPG  SetupManager::Rollback Mode Detected

2013-10-20 10:37:42, Warning               MOUPG  SetupManager: Error retrieving setup platform result: [0x80070002]

2013-10-20 10:37:42, Info                  MOUPG  SetupManager::Reporting rollback event

2013-10-20 10:37:42, Error                 MOUPG  CSetupNotify::ReportEventW(182): Result = 0x80070422

2013-10-20 10:37:42, Error                 MOUPG  SetupManager::Reporting rollback event: [0xC1900101, 0x20017]

2013-10-20 10:37:42, Info                  MOUPG  SetupManager: RollbackCount = [16]

2013-10-20 10:37:42, Info                  MOUPG  SetupMgr: Entering rollback UI phase. Removing registry key [HKCU\SYSTEM\Setup\MoSetup\Volatile]

2013-10-20 10:37:42, Info                  MOUPG  CSetupUIManager::ShowRollBackMsg: Called!

Where does one find the log file? Sounds like a good idea...

As I wrote here, all Upgrade-Infos are written to a hidden folder $Windows.~BT

The logs are .log-text files within those two folders:

$Windows.~BT\sources\Panther

$Windows.~BT\sources\Rollback

First folder is for pre-install, Rollback is for install matter. Copy the .log-files to your desktop - then you are able to open it in notepad.exe.

HTH

Where does one find the log file? Sounds like a good idea...

Think I'll give that one a try.