Windows 7 activation error – invalid product key
Are you having problems installing Windows 7 due to an invalid product key?
Microsoft have published two articles describing issues which you may be experiencing…
Windows 7 installation error message 0xC004F061 when trying to install Windows 7 using an upgrade product key
Windows 7 activation error due to invalid product key, which describes several other possible problems which may be preventing you from installing Windows 7
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