I upgraded to win 10 when they were offering from windows 7 back in the day. The computer I upgraded it on died so I was able to find a way to copy the OS to a USB and install it on the new machine. It works but I need to change some of the settings and until its activated the settings are all greyed out. I was able to find the key for windows 10 on my old system but when I put that key into the activation provided by Microsoft it doesnt work and said it is not a valid key.
How can I activate it?
How can I activate it?