I was using my laptop earlier, everything was fine. Left it running for few hours, when i came back to it, i noticed that screen has turned black and isnt responding. I tried restarting computer, got stuck at "windows loading" screen. Computer couldnt boot for like 20 mins. Eventually it did boot but it was extremely slow. Every action i would make would take like half an hour to complete. I tried booting into safe mode but results were pretty much the same - slow boot and very slow processing. Can I do anything before doing a clean reinstall?