How to cancel Upgrade ?

[SiiJei]

I have inserted a wrong upgrade key on "Windows Anytime Upgrade"
and I cannot cancel it , it still veryfies my key . How do I cancel again
my "Windows Anytime Upgrade" and I will put on my right upgrade key ?
any solutions ? thanks in advance for those answers

 

[gregrocker]

If it completed upgrade change key at Control Panel>System activation link.

If that's not available insert the Product Key in an Elevated Command Prompt:
slmgr -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

http://www.sevenforums.com/tutorials/18630-product-key-number-change.html