And guess what? Only one glitch of any kind in the last 24 freaking hours and that when I was running a whole load of programmes simultaneously. I can watch my shows again without having to wait for reboots every few minutes. At some point, I may try playing Civ, not because I want to but just to see if I can.
All this, and it was a programme clash. I am so stupid not to have thought of that earlier.