Hi! Your solution didn't help me, alas (here's a full list of what I've tried so far, if you're interested http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_install/market-upgrade-rolls-back-with-0xc1900101-0x20017/f8b469b1-2cc9-4791-b55a-6fcb16bd9700 )
However, thanks for the tutorial on recreating System Reserved. I now have it and it will probably be useful some day. Sorry for off-topic, but what else do I need to do to make Reset and Refresh options function without external installation media?