Hello, My Windows XP recently crashed. I had a blue screen error everytime I started Windows which said 'registry key error'. I am useless with computers so I took it to this guy. Now it is working. However I have noticed I have 2 windows on my comp: the old one which is still not working and a new one added by this guy on partition H (the previous was on C) I used to play a game on the pc before which worked fine. Now my screen is pixelled (the difference is not that big but I can see it) and the game I play now is slow and pixeled. I asked him if he installed the video drivers he said he did. Please help.