Work computer restarts for no apparent reason

[resu]

hi,

my works computer has started playing up again :S

anyway this is how it goes

i turned on my computer this morning and it had been running fine for around and hour and a half then for no reason it restarted ... i lost what i was working on .. i am less than impressed lol
anyway after about 30mins of working again it decides to restart yet again

the only thing i can think is that its the processor over heating but looking at the temperatures it shoudl be fine

can any of you guys suggest anything?

thanks in advance

 

[raybay]

Is this an HP. Is this an AMD processor computer? Do you have Service Pack 3 installed.
Tell us more about your brand and model, OS, and computer age?

 

[resu]

sry i ment to write the specs out but ppl kept distracting me lol

ok i got these from using PC Wizard 2008

as far as i know the machine was built for us by a CAD specialist tho that was a while ago now as youll see

mainboard - Intel D865GBF
chipset - Intel i865PE
CPU - Pentium 4 (3GHz)

1.5gb ram

running xp pro 5.01.2600 service pack 2

DX version 9.0c


thats pretty much it really .. if you want anymore info just gimmie a shout

 

[seanc]

Do you get a flash of a blue screen before it restarts?
I'd suspect your power supply, but it might be worth running memtest to see if that's the cause instead.

If the processor overheats it would most likely just turn off.

 

[raybay]

Dirty fan; dirty cpu fan or worn out cpu fan. Use Dust off to clean out the system. Otherwise, seanc has a good guess. Nearly always power supply, memory, video card, bad driver in concert with Windows update; or an infestation. If none of those workout, download and run the free HiJack This, and send us the report it creates.