Blue screen (driver_irql_not_less_or_equal)

[d3gan]

I get this error every time I turn on my laptop(Dell Studio 1557) after for example 15 min.
I changed my Windows but still I get this bluescreen even in my Linux(Ubuntu) crashed after a while.
Here is some of my minidump

 

[Tmagic650]

Looks like an ATI driver problem, but go here and run the hard drive and memory tests:
https://www.techspot.com/vb/topic51365.html