is a unique 25-character alphanumeric code (e.g., XXXXX-XXXXX-XXXXX-XXXXX-XXXXX) that you must enter to prove your software is genuine. Where to Find Your Windows 7 Ultimate Product Key Since your ID contains "
If you own a computer that originally came with Windows 7 Ultimate, the key is not in that ID number. You can find it: is a unique 25-character alphanumeric code (e