was trying to update win 8.1 to win 10 from the windows 10 tile on ribbon for update.
after three or four attempts only thing I could do was boot into safe mode only

tried to change boot disk priority setting and brought a previous version of win 7 ultimate

then rebooted back to win 10 (8.1) disk

and got
BSOD
DPC_WATCHDOG_VIOLATION

ANYONE KNOW ANYTHING ABOUT THIS?