I recently acquired an PC built by a UK company which usually comes with a restore disc which is linked to an SLIC in the BIOS. However i did not have this disc, i had a windows 7 pro oem disc from a dell PC. I used this disc to install Win 7 pro 64 and used the serial key from the COA on the pc to activate.. it said this type of activation cannot be done online and i had to use the automated telephone service.. which activated the key without issue. My question, since i'm selling this on, is this kind of activation legit and will it stick? Once activated it can't be deactivated can it?