have you tried a diifferent version of windows and a fresh windows install?
The windows 8.1 64 bit installation of windows is less than 4 weeks old & has all updates applied. I have no intention of doing a clean install of windows and all of my applications.
I have all of the latest Intel drivers installed. I was considering rolling back the graphics driver to the previous version but as the system hasn't failed for a couple of days I'm monitoring the situation at the moment.