Unusual shutdown at random interval

How old is this laptop? Maybe renewing the thermo paste will help

Its about 3 years I think ...

Any idea what could be causing the auto instant shutdowns?

well could still be a heat problem. does it do the same thing when running on just battery? try brunning it with the battery removed from laptop.

I tried that .. system seems to stay overheated with or w/o battery. Someone suggested it could be a motherboard issue? could it?

It possible you feel comfortable taking laptop apart to clean and reapply thermo paste

ok I'll try that

I know its an old thread but the question is related to this one .. so I'm gonna ask here ... I was having random auto-shutdown issue with my dell laptop and it seems according to this article ... dell xps l502x freezes making buzzz sound while playing audio or video file - Laptop Audio - Laptop - Dell Community couple of dell software updates caused this issue and after removing them it was working fine but one of those software's are "My Dell" ... it can be used to monitor battery health, HDD,processor performance etc .. its quite helpful and I just noticed it was removed along with those updates.

Anyone know where do l get a previous version of this software? (like maybe 4/5 months back or perhaps years old version is fine .. as I only use it for checking purposes.