Starting and pressing F8 then choosing Last know good configuration doesn't help, and if I choose Safe Mode it will get so far (with lots of writing on the screen, very basic white font) then freeze. The last thing that comes up before freezing is:
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS\System32\Drivers\Mup.sys
Any help (if this is recoverable) would be appreciated, as I spent quite a few hours trying to find how to remove 'System Security', only to have this happen. Thanks.