Ok, I did some checks and here goes:
1. Antirootkit utility and Win defender offline didn't find anything.
2. Display driver
is up to date according to ATI driver downloader app from their site
3. Chkdsk scanned my PC and automatically restarted so I have no idea if it found and fixed any errors...
4. Did memtset86+ about 2 weeks ago during whole night and it was ok, and so was test with Seagate software
So not really sure if any of this had helped but thanks again for your time and trouble, and hopefully there will be no more annoying BSODs...
If there are any more suggestions please let me know