i have recently upgrade my graphics card and it has been running very well
for a while until the last few days where it restarts by itself whenever i
run world of warcraft, and by restarting i mean the screen going all black
and starting over (as if i pressed the restart button on my machine). now, i
have tried everything i can think of to solve this problem, but none of them
worked. i tried upgrading my ram, defraging my discs, setting my graphics
card and in game resolution to full performance instead of quality, disabling
the 'restart if error occurs' function, and probably some other stuff that i
forgot. my computer seems to run fine if i dont run any games (it is even
restarting if i play warcraft 3). my system specs are:

pentium 4 2.8GHZ
1GB DDR ram
ATI radeon 9550

thx.