my PC restart almost each time i play any games. it happens when a game is autosaving or when i save the game, and in some other circumstances. noticably this happens with serious sam 2 (ori) and other few games (pirated and ori).

could it be my combo dvd/cdrw is causing this? my combo is a bit unreliable - when i insert a cd/dvd it will reject back. so, i have to "force" it to get in the tray.

my pc specs:
pentium 4 3.0ghz HT
ram 1GB
graphics card nvidia winfast 7600 extreme
PSU 450 watts

hope anyone can help me here. thanks.

Maybe a faulty RAM...there change another stick to try it out.....

Try to play games without the drive 1st.If the problem still persist,there maybe over heating or something else.

normally there are 2 reasons s com restarts in a middle of a game. Either it does not have enough juice or it overheated. But looking at 450watt, I don't think it has anything to do wit the psu being not powerful enough. Maybe its faulty, or your com just over heated

the 3 most probably reasons
1) overheating......monitor ur cpu temperature
2) overclocking........disable any overclocking
3) unstable PSU.........get a branded 1 like enermax