PC turns off automatically

Hi there,
THis problem started from last month…
When Im working in my pc, PC turns off completely, no shutting down ms, no errors, nothing…. and when I restart, it turns on normally…
So I thought it was heat sink problem, so I kept a table fan near the opened cabinet, but still this problem, then I saw the event viewer and I got this msg…
Error
The following boot-start or system-start driver(s) failed to load: FVXSCSI
I looked up at google, but no help….
Can anyone pls help me out of this?
PC config
Mercury motherboard
512 ram
pentium 4 2.8Ghz
Nvidia 5600XT
250gb Hard disk
TIA
Answer #1
Reformat your pc. A clean install.


Answer #2
Reformat your pc. A clean install.


Thats a last resort….
I have heard of this problem before but never a clear solution.
When did the problem start? Did you change anything?
Answer #3
Clean the registry, fix error
Use Tune-Up Utilities or any registry cleaner
HAppened to me when I first had computer and didn’t do any cleanup
Answer #4
Once i got that problem with my old pc, i brought it to the technician, and they said the power supply was faulty…try bringing it to the technician…
Answer #5
Thanks for suggestion, but I’ve formatted my system 4 times this week to clear that problem, but no hope.
and I clean registery daily with WinXP manager…
Power supply is also fine…
Answer #6
Try to check the fuse…or maybe ur processor is overheating…try to check if there is enough thermal compound
Answer #7
are all your fans working properly?
Answer #8
OF course, fans are working properly…
Answer #9
how did you check the power supply ?
I've formatted my system 4 times this weeka hardware problem then
replace the mobo battery
remove and reseat all components & plugs & mobo jumpers
replace the main power cord
Answer #10
how did you check the power supply ?
I've formatted my system 4 times this weeka hardware problem then
replace the mobo battery
remove and reseat all components & plugs & mobo jumpers
replace the main power cord
A electrician did…
OK, will do as u said!
THanks!