I have WinXP OEM, updated version.

Otfen when I working with computer it just frizing and I must restart it.
I couldnt find any problem that i know.

In hardware i getting wrong information type about monitors:
It show that I have 3 monitors on same Grafik card, 2 is default monitors and 1 (M700 Compaq) is right monitor.
I tried to delete them but it could not help.

Can it be this problem that can frize my PC?

Can it be some other Hardware problem or it is windows problem?

Which program that i can use to test my computer for problems if it is possible?