Hi, I am entering the correct code, Windows 7 will not accept the letter 'N' as part of this code. if I paste the code T389G-NM4WY-TH4YF-R6Q8P-FX8XC into Windows 7 what gets pasted is T389G-M4WYT-H4YFR-RQ8PF-X8X, the letter 'N' is omitted. If I type the code in, when I get to the letter 'N', I get the 'Unacceptable Character' message. None of the letters A E I L N O S U are acceptable as part of a Windows 7 Key. Try this yourself. As the complete code is in this email, why don't you try pasting it into a copy of Windows 7 to prove this. I have another installation as well as the one that this key is intended for and it doesn't accept the letter 'N' either. The code you sold me is NOT a valid Windows 7 key. Please send me a valid key.