This is HOW:Windows 8 Activaion Instructions:

1. press windows key + r 
2. type slui 3
3. enter this key for Pro: QGR4N-78PMD-KCRQ7-83BXT-YG667 / J7JBD-2NTPH-HXFHK-3FXFP-TMQG7 for Enterprise turn off internet first before doing step 1: TNHV9-74XMY-QVT69-CV8W6-RRDHC 
J87JG-PXNR9-68BRP-DGJ9P-TMQHC
4. click activate, ignore the error message, click close.
5. press windows key + r again
6. type slui 4
7. pick UK for the country
8. using skype, call the toll free number, press 1 for home user then the # key.
9. just listen to the voice prompt and enter the numbers. press 1 for number of computers serial is currently activated
10. if the codes are accepted, you will receive the confirmation id
11. just enter the numbers from blocks A-H, click activate.
12. Done, Windows 8 is now activated.