A product key is a sequence of alphanumeric characters used to certify if the copy of a program or software is genuine. For example, Microsoft uses a 25-character alphanumeric key to identify the ...
The Windows Activation system periodically checks for the validity of your key. If you have a genuine key and suddenly receive Windows Activation Error 0x800704cF ...
In brief For the longest time Windows PCs came with a product key sticker that was placed outside of the machine or with your computer's manuals. But in recent years manufacturers started storing this ...