Well this is a fun one.
Got a laptop to work on. Guy said his laptop started updating to windows 10 ( he didnt want it though ) from win 7 home but he said screw it and let it update. Hour later he checked it and it was stuck in a loop.
Boot up - black screen with underscore at top left - reboots.
That is the cycle.
Can get to bios, can't get to safe mode. Can't get to boot from USB or from DVD.
I pulled the drive and it was able to be read on another computer. Can see windows folder and windows.old. Only guess is the install went batbleep and screwed everything up.
If i attach a bare drive to the laptop, it can read from USB / DVD. Just not when the original drive is in there.
Guessing my options are to copy original drive for backup purposes, then wipe it clean, put it back in the laptop and reinstall win 7 then disable win 10 updates