In April I bought a new Dell desktop tower with win 7 pro installed on hard drive and a dvd disk of win 8.1 (orange disk that states already "installed on your computer", which it isn't as a specifically bought a pc with win 7. Now I would like to try 8.1 but I don't see the typical 25 digit activation code on the white sleeve the disk is in (sleeve is still sealed), how do I install and activate this 8.1 disk with no code?
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