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I've a burned Windows7 DVD from 2 years or maybe 3 I bought it from "Publinet" (Internet Café but without coffee!), what I want to know is, after all that time, how can I know if this DVD is missing any files and if its still usable or not?

I've also many other DVDs and I want to know if I can still use them without problems or not?

BTW, I'm using Ubuntu (if anyone will give a software link)

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Why do you have reason to think that it may not be usable? Unless it looks like it's in bad condition and/or it has been mistreated, a DVD burned 2-3 years ago should still be fine, assuming it was fine at the time. – Moshe Katz Jul 22 '14 at 1:49
@MosheKatz Because, I remember I had a problem when Installing it, in the end of Installation of Windows7 Ultimate. sometimes I get a problem and sometimes no, and, this time, I don't want to lose any files – GeekEmad Jul 22 '14 at 2:13
You could always just burn a completely new copy. This page has links to all of the official ISO images. (Yes, those images are provided by Microsoft and hosted by a Microsoft-authorized site.) It's probably easier to do that than to re-verify an old disc. The images linked here may also be newer than the one you originally used so they may have updates pre-installed. – Moshe Katz Jul 22 '14 at 2:27
@MosheKatz I downloaded one but I had a problem when burning it, and I don't know it will work with this problem or not (it's burned, but the software stopped after that.. it's a bug in the software) – GeekEmad Jul 22 '14 at 3:14

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