As the title say's! Full error on display shown is: Failure configuring Windows updates. Undoing changes. Don't turn off your computer I started to update Windows 8.1 Pro WMC from within windows with the offered update from Microsoft and now since 2 hour already it's trying to revert back to the original! That computer formerly had Windows 7 Ultimate, updated to Windows 8 using the offer from MS for 15 bucks, updated again to Windows 8.1 as it was offered via Windows Store and that all went well without an single problem! Today is started to use the from MS offered and already checked updates, which were include and near 900MB Update, which was seem to work well too! after 1.5h the computer restarted and another 30min later that error appreared. I'll let that run and see all will be back normal without the need to restore from an Drive Image. That's just for to see the "Recovery" will work correctly. It isn't an important machine, just one normally used for to test apps etc. but it will some idea in such case a recovery will mainly work or not! Will report later on what happen.