Apart from the fact that it succeeded in killing my computer - what can I say? I ended up having to take it to a proper Computer Repair shop and having them work on it!! The whole idea of spending £35 on this Windows 7 disc was that I would thereafter be able to update further to Windows 10 at some point.....not that I would have to go to a computer repairer and spend even more money! If I had known that by sitting there watching the disc working and following instructions to the letter, I was actually causing problems ...I wouldn't have bought this disc in the first place. As you can gather - I am not in the LEAST bit impressed!!