Windows Product Key Hash: /kehptF9HHVxM5d8dUnqgcfndXw= Kindly help me to solve this problem (I am not a computer professional)Ĭached Online Validation Code: 0xc004c4a2 but I do not know how to make my windows 7 as original since I feel something had gone wrong in my system and my computer screen goes black and frequently pop up message is disturbing. I am unable to verify my windows product key which seems to be not genuine.