BSOD Worker thread returned at bad IRQL

Oh, sorry I forgot to post my results. ATM I'm working for a programming project and I don't have a lot of time for anything else, let alone think about anything else.

I did follow all the steps. I also ran Dell Diagnostics (which tests all of the hardware), which was adviced by my school's tech support, and I didn't get any hardware issues. I did find some triggers after recurring situations: µtorrent and windows hibernate.
If I run µtorrent the BSOD will follow a few minutes later. So I deleted it for a few days now and I only get BSOD because of hibernate, but that's only an assumption. My laptop can run high CPU/RAM/read-write demanding tasks for a few hours without any problems, but when I put it in hibernate, the BSOD would follow in the next 2 hours after getting it out of hibernate.

I hope this will help you any further.
If I can't fix the problem, I could back-up my files and do a clean install. My only worry is, that it's hardware related and a reinstall won't fix it.

Oh, right, I forgot to delete it. I'll do it right now. Is avast! free a good replacement?

Happy New Year to you too.

I didn't have any BSOD after deinstalling McAfee and I've been using µTorrent again, with no problems.
So I guess this can be flagged as solved.

Thanks for your help.