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Windows 7 key not valid?

Last response: in Windows 7
October 31, 2012 11:11:22 PM

i just finished my build and i bought an oem copy of windows 7, but when i type in the product key is says its not valid? please help

More about : windows key valid

a b $ Windows 7
October 31, 2012 11:16:13 PM

Where did you buy this copy?
Was the key printed on a COA and packaged with the disc?
October 31, 2012 11:18:12 PM

i bought it at a memory express, along with the rest of my system. i dont know what you meen by coa
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a b $ Windows 7
October 31, 2012 11:24:13 PM

COA = Certificate Of Authenticity

It's the label that has the 25 character key printed on it. The keys are specific to their particular type. For example, a retail key will not work to activate an OEM version, and vice-versa.
October 31, 2012 11:25:17 PM

check your zeros and Ohs, ones and Ls and any other possible typos
a b $ Windows 7
October 31, 2012 11:33:44 PM

Hi :) 

Did it come in a box ? and if so what colour ?

All the best Brett :)