As described in previous post Windows 7 forced upgrade on my Shuttle HX61V failed with infinite boot loop.
I removed all thirdparty drivers but did not help. PC was left on this state, USB3 was not working etc.
Today arrived scheduled upgrade. I decided to give a try. After initial downloads upgrade started. It took really long time, issue can be that PC has two WIFI adapters – the internal Realtek one and external D-Link USB dongle. The first one was disabled by default in Win 7.
Anyway my wait was awarded and upgrade was successful. After first normal boot PC was still lagging, probably there was still some background magic going on. After loading latest upgrades all starter running smoothly.