since yesterday everything was ok. Now after about 1 hour of work I
obtain an error message that is some problem with graphic card driver and card cannot stop drawing or something like this.After few seconds computer rebooting itself.I reinstalled grafhic driver few times under safe mode and each time i did these it was allright only for about 1 h.after these time it happens again.is it really problem with driver or is it somthing wrong with hardware?

1) What kind of card are you running?
2) What drivers are you installing?
3) Do you uninstall the drivers first, reboot, and then reinstall?
4) Generally, the only hardware failure is the fan. Some of them have intermittant fans, some run full time.

thank you for answer !
1)I'm running vanta lt
2) I'm installing nvidia driver for windows xp v.43.45
3)Yes I do
4)My card hasn't fan , it's too old
5)error message code is save dump id:1001, i've checked it on microsoft side it can be both driver problem or hardware failure , but I still don't now how to find it.Maybe the only way is to try
another card?