Hey guys.
I stand in a quite weird sitation..
Some days ago, i met a problem that resaulted in my CPU fan would not start.
That was rather strange so i thought it simply didn't work. After bixing a bit with it, i tried replace my Memory, and now it seems to work again.
The new problem is, while i couldn't make the Fan spin, i tried resetting the BIOS, something i did by request from a friend, who recently installed it from new.
What now happens is, it Blue screens 2 seconds after the window logo apears.
My friend, when he reinstalled my OS he changed the Win to something els, to run on something els from the BIOS, and i have absolutely no clue to what he did

Is there anyone here, who might know what i am talking about?

i know he tried making me do it, before the reinstallation, and that made the win go Blue screen aswell, so most likely could be what the problem is now, due to a reset of the Bios.
Help a fellow noob to fix this problem :'(
Many regards.
Angel