My computer has been randomly crashing with bsod(blue screens of death). It happens almost every day now. It tends to happen when i am browsing the net, but it can also happen when I’m not even using it or simply typing.

Here’s some of the errors it’s showed when crashing:

-irq not less or equal
-page fault in non paged area
-bad pool header

Sometimes with these errors the name of a specific file is given. Once the ‘page fault in a non paged area’ error came up and a specific filename was given – win32k.sys. I have also seen the ntfs.sys file being linked to one error.

I have also noticed that programs tend to crash a lot more when I am using them – specifically IE and Mozilla.

Are there any diagnostic tools that will help me locate the source of the error?
Is it a case of corrupted files in the system?
Is it hardware or software related?
Is it a virus?

Had this problem few months ago but I did a clean install. Now its back again. Please help me