So i had a hell of a time upgrading to 7 and ended up having to reformat my drive. which means my XP install was wiped out. so i did a clean install with an upgrade cd/key. Everything worked fine then i couldn’t activate! So after some poking around here’s how i resolved it.
First pop open your registry editor by clicking start, then typing “regedit” in the blank. go to “HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE” and locate the “MediaBootInstall” key, double click on it an change the 1 to a 0. hit ok and close regedit. Then click start and type cmd. most of you fuckers just hit enter didn’t you? you fucked up. Click start then type cmd in the blank and right click on the option that is available and left click “Run As Administrator”
Now type in “slmgr /rearm” and hit enter. it will ask you to reboot, go ahead. When your system comes back up just try to activate it like normal and your all set!
That will make the OS think that you upgraded properly instead of doing a clean install


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