| Error Code | Display Text | |------------|---------------| | 0xC004F034 | "The product key you entered is for a different version of Windows. Please check your product key." | | 0xC004C008 | "The product key has already been used on another PC. Try a different key." | | 0xC004E003 | "Activation server determined the product key has been blocked." | | 0x80072EE2 | "A connection error occurred. Check your internet connection and try again." | | 0xC004D401 | "The Software Licensing Service reported that the product key is not available for this edition of Windows." |
"To activate Windows, you need a product key. The product key is a 25-character code found on the certificate of authenticity on your computer or on the Windows DVD box." windows 7 activation text