Windows 7 SP1 just installed but tne machine refuses to boot now.
Had to borrow a keyboard as the USB wireless keyboard wouldn't work.
Found that by allowing unsigned drivers the machine will boot.
How do I identify WHICH driver is the unsigned one causing troubles as I don't recall loading anything new recently, certainly not in the day or two before the update installed.
When it boots the machine "stutters" by freezing and then working again so something is wrong but all the drivers report as the latest and as working fine?