I am having problems activating a copy of Office Home & Student 2010 purchased retail. I am being told that the product
key is not valid, though I have re-entered it twice.
Above links did not help to solve the problem.
My OS is Windows 7.
Please follow the
step-by-step solution in this kb:
Invalid product key errors in Microsoft Office
How to troubleshoot problems that you may experience when you try to activate an Office product
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