I was dealing with some issues last night when I got home and decided what the hell and finally installed it (windows update has been staring at me for weeks with it now) - why not install a service pack on top of pre-existing issues right?. I'm blaming it for officially tanking my system. When all was said and done before I said fuck it and formatted - It would reboot its self a number of times - fail booting to safe mode - and finally start to load windows just to log me off and not let me back on. Formatted and it's been good so far. Actually installing SP3 right now so to this working so I can go to bed. Would like move on to memtest tomorrow (or Monday if I leave for the weekend) to figure out if I've got RAM issues that started this downward spiral.