Try to follow steps to change out the OEM with the COA SLP key but under "My Computer" I dont have option for "Change Product Key".......also, when I tried the alternate method to "Start", Run, Typing slui.exe 3, this file was not found......can you advise? I
have valid COA and actualy had bought two of these computers from same supplier...they are identical and the other has no issues with validating windows...thanks for your help.