Invalid serial number XP after reformat PC

I have reformat my old PC with windows XP Home Edition, then after re-installation of windows XP Home Edition serial No.. shows invalid when I try to activate windows (Please specify) thx Danny

Assuming you are using the correct CD, should be CAREFULLY enter your product key, be careful not to confuse an 8 with a B a S with a 5, etc.

Tags: Windows

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