Sudden BSOD - system_thread_exception_not_handled

I also get: irql_not_less_or_equal sometimes.

My computer: Aspire V3 - 772G
NVIDIA GeForce GT 750M

I have no clue what causes this - I use Firefox as browser, and I run no other large programs.
The BSOD comes suddenly, machine freezes for about 2 seconds first.

Please help - It's so annoying!

Here is a screenshot from the system windows 8.1 from my laptop:

Hi Gomle & Welcome to the forums ^_^,

In order to help you with your problem, we would need the Dump files to analyze them and see what is causing the problem. Could you please follow the instructions over :-

http://www.eightforums.com/bsod-cra...e-screen-death-bsod-posting-instructions.html

and post back a freshly generated Diagnostic ZIP File so that could be analyzed?