Soldato
I'd do a full windows re-install if I had major problems, but I have way too much on my computer and not enough time to think about doing it all, I will wait till windows 10 is out before that.
Fair play, if I was to do a setup re-install, it'l take the best part of 4hrs+ to set up everything the way it is, but(as DDU etc can wipe essential core files for installing gfx drivers), don't you have a spare sd/hd you could install the bare minimum to find out if your current system has a fault?
Last time I set up, I cloned the fresh setup and if anything goes wrong, now I don't have all the setup hassle to go through as most of it is good to go.