If that does not resolve your issue, please follow the steps below. Please follow the resolution portion of the doc. F.0520071008000000.000000+0000D303507018400DE08090409GMT Standard Time(GMT+00:00)03HPQOEMSLIC-MPC1021002007 Microsoft Office system1219įirst off, there is a Support Doc: ' You may be prompted to activate Windows Vista on a computer on which Windows Vista was already activated by a Volume License or OEM installation' at EN-US 931573 That I believe is specific to your issue. Windows Product Key Hash: f7FPE6g/CLFmnJ4E6GbEU9Xn1sA= I want to continue to use my REAL copy of Vista but it won't accept my key as valid!