Originally Posted by dedi
Change it from 1 to 0
then reboot and activate
If this does not work alone, continue with
1. Open elevated command prompt (Right click -> Run As Administrator)
2. Type slmgr -rearm <enter>
After that it should be activated.
i saw this online and tried it earlier - but the key was missing.
after doing the slmgr re-arm and rebooting, the key has now appeared and i'll give it another shot.
Originally Posted by redeye
you get a key for win 8 pro. (and i works for me for a clean install)
i don't really know if you can upgrade the win8 preview with the key (microsoft "free" preview OS tend not to be upgradable..) you can try, nothing lost. if it does not work, reinstall win8, and you could do the files and settings thing, reinstall all the programs etc... "a clean install"
clean install works, but only for about a day. then it asks for the key again and it wont accept the upgrade key (testing the regedit method people have mentioned, to see if that works)