dell laptop turning off after a while

[simincc]

i have a dell vostro 1540 laptop windows 7 home edition.
for the first time it turned off after 2 3 hours of working..this happened 4 or 5 times again...i thought it was virus and wanted to re-install windows..but i couldn't because the time of turning off had been shorter that couldn't even start windows...i searched for this problem and found that i should reset my hard...when i did that it have been fixed for a day..but after that the problem came back...i didn't know if it is virus or software problem or hardware problem ..i don't know .....

 

[hodsocks]

If its turning off rather than rebooting it sounds as though it may be overheating, try cleaning out the fan area, I usually use a can of air duster.

 

[Gurii Benipal]

same problem happnd to me... what should i do...