D
DIckmandude
I'm trying to activate Windows 10 Pro on a refurbished HP Z420. There is what appears to be an authentic COA sticker on the top of the box. There is no indication of the usual 25-digit product key, but there is a 23 digit number along the top of one of the UPCs exhibiting a format I'm not familiar with as well as a 10-digit number, indicated by the words "Security Code:" near the lower part of the sticker. Does anybody know how I can validate the software with the information on the sticker? I bought the computer from one of probably 8 or 9 vendors, I don't remember which.
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