I had taken part it Windows Vista Customer Preview Program and had bought Windows Vista Beta 2 DVD box having both versions of Vista (X86 and X64). I did not had any issue in installing them on my system's but today i downloaded both versions of Windows Vista RC1. Installation of X86 went fine using the same product key that i had used for installing Vista Beta but i am not able to use it for X64, what might be wrong? any idea?
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