A few months ago my computer suddenly stopped working and had to be taken to maintenance.
The problem was found to be my broken motherboard wich was replaced.
Since then i've had trouble playing any games on my computer.

Other wise the computer works fine, but almost all of my games crash.
The crash has occurred in two ways;
A)In most games, screen getting stuck at an view, keyboard and mouse stopping working and the lights go off, and the speaker make a ''pox'' sound.
B)More recently, screen turns blue, but without text, but everything else seems to work.
In both cases i have to boot the computer.
I have tried to;
- update my video card drivers, twice.
- update my motherboard drivers, don't know if even worked
- use the ''repair'' thingy of WoW
- deleting all useless things to make more free memory
And if it helps, here's a list of the games that have been doing this (at least wich i know of);
WoW+TBC - Case B
Unreal Tournament 2004 - Case A
Warcraft 3 TFT - Case A
TES:Oblivion - Case B after about 30-120 minutes.
Half-Life 2 Deathmatch - Case A
Still, games like CC and Toribash seem to work, and even Overlord works.

Please, I beg you, do you have any solutions to this?

get the "crap cleaner" program it solves all my comp problems.Filehippo.com

http://www.ccleaner.com/

Anyways, reformat.

It's fixed problems for me I didn't even know could be fixed like that.

Just tried the CCleaner, gonan see if it worked.
About the reformatting; not gonna do it atleas tuntil it's obvious it's the only choice.
I don't like reinstalling things.

Update: Tried playin WoW, crashed with case A.