I thought that sfc /scannow would work but I don't think it repairs the registry, just the .dlls. Is there a command that repairs the registry without having to repair XP entirely? I have found that a screwed up registry is the main cause of slow bootup times. But I don't know how to repair it without deleting the registry commands of programs already installed. All I really like to do is add those commands that may have been deleted by mistake or made corrupt by mistake. Is there a way to do this?