I removed the WLAN card from my computer and tried again, but it freezes at exactly the same point, 75% right after third reboot
this time however I get this from SetupDiag :
Error: SetupDiag reports abrupt down-level failure.
Last Operation: Finalize
Error: 0xC1900201 - 0x40008
The windows update process freezes every time at 75% after the second boot, forcing me to do a hard power shutdown.
after that it rolls back to the original version and shows the error 0xC1900101-0x40021 (sometimes 0xC1900101-0x30018)
I tried doing a clean boot as per Microsoft directions but...