Not sure about whether I should be worried but rather recently the screen started flickering (selective areas, sometimes a window would flicker over another in the wrong scale, etc). I tried to shut it down but it had to update first. I gave it 45 minutes, but it was still stuck in the first update with no HDD activity, so I forcibly shut it down. Then I took a look inside it, rearranged some cables and installed an extra 8GB of RAM. When I turned it on again Chrome had for whatever reason decided to forget my extensions and my theme. Should I be worried?