Lost Product Key for Windows 7 Ultimate

[Rico]

I am trying to load Windows 7 Ultimate on to a MAC Workbook Pro. I have the Original Ultimate CD from Microsoft. I have inserted the key code (25 digits) initially and thought that was all I needed for installation. I'm at the end of the installation & am being asked for the 'Product Key Code".

I typed the same code I used at the beginning of the installation, but an error message says, "invalid key code" ..

What are my options at this point..?

Thanks ...

 

[TrainableMan]

It's probably a typo; I would try again.

If it doesn't work then return the DVD where you bought it for exchange. If you bought it off eBay then it's probably fake and you will want to file a claim.