How to activate Windows 8 All Version's EASY, PERMANENTLY, FREE
Start: regedit: HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/Current Version/Setup/OOBE
2x click on MediaBootInstall. Set the key 0 (when it isnt already) and click OK. Close regedit. Start Cmd as Admin. And Type: slmgr /rearm.
Then restart Windows!!