I upgraded to 6.5.0 from 6.4.1 through Tools>Update OS. Everything seemed to go fine except when I rebooted.   After hooking up a monitor and keyboard I found out it was getting hung right after bizroot...OK. Right after the "OK" the screen would flash and the "Starting OS in 1 second" would be displayed and the system would be locked up. I tried booting in safe mode and it did the same thing.   Next I tried booting to GUI and it went all the way to the screen that asks fo