I was having an issue with a game and this guy told me to do a repair install of Win7. Win7 had nothing to do with the issue but when I said I won't do a repair install because it overwrites the registry. He says it does not overwrite the registry. I haven't done a repair install since XP but am sure it overwrote the registry on XP when I did. Does it or doesn't it do that on Win7? How is it a repair if it doesn't overwrite the old registry? The registry is often the cause of issues.