Sorry guys, this question is really important. It is sort of off topic, but kind of on topic, because we need computer advice in order to turk! Anyways, I have a really bad disorder of O.C.D. and seem to love to keep my work computer clean and free of space, so it works as fast and as efficiently as possible. For example, I don't like no programs on my computer, unless it's something that helps me work faster. Anyway, I'm assuming I deleted some registry files and some things aren't working right. I currently use Windows 7. If I upgrade to the Windows 7 Premium version, will this fix a missing file problem?