- Feb 22, 2015
- 26
- 0
- 4,530
I want to install Windows 8.1 from a CD i received when i bought another computer. The CD-Key had been used to activate the copy of Windows 8.1 on the other computer, which has since been upgraded to Windows 10 for free. If i re-use the CD-Key, will the copy of Windows 10 be invalidated?
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