Then something is very wrong! There is something hanging the system and it's not showing in the Task Manager! Did you try tight click on the Taskbar> Task Manager?
But, Magnock, you're feed us a little information at a time. Original post didn't mention corrupt memory module , now you say the hang up is at the blue screen and saving setting, nothing works not even the keyboard.
There is another place to check, the Event Viewer- from what you're saying now, I don't know if you can even access it!
Follow this path:
Control Panel Administrative Tools> Event Viewer> Click on System & Apps, one at a time on the left> look for Errors on the right> right click error> Properties> note description of error, Event# and Source.
There is a "copy" button below the up/down arrows. Click that, then go to any place that allows you to type (ie. notepad, wordpad, this board) and you can paste (use CTRL-V) the entire event details there. It makes for easy reporting of the event.
Or you can use these sites:
http://www.eventid.net/search.asp
http://www.monitorware.com/en/events/
If you post the copies to this board, you don't need to include all the lines of code that follow the Description. This can be accessed in Safe Mode if needed.