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How to change activation key when upgrading from 7 Home Premium to Pro
Hello
I am trying to upgrade one of my laptops at the office from 7 Home Premium 64 bit to pro. I have bought several upgrade keys because I have several computers in the office. I lost track of how many times I used each of the keys. So on this one computer I entered one of the activation keys into Windows Anytime Upgrade. It keeps failing and tells me to go the Microsoft website for help. I suspect it's failing because I had already used that particular key too many times. I am trying to enter another activation key I have, but there's no option for that. Every time I go to Anytime Upgrade it tries to run the update using the key I had already entered with no option to enter a different key.
Thanks
Khaled