My computer failed and they had to replace the motherboard. Now my Windows 10 license needs activation but I don't remember it. WHat can I do?
The Windows 10 Anniversary Update added a killer feature for DIY types: The ability to tie your Windows 10 license to your Microsoft Account, rather than to your PC’s hardware. Say goodbye to the days of calling Microsoft support to activate your OS simply because you swapped out your motherboard.
If Windows 10 freaks out after you upgrade your PC, go to Settings > Update & Security, add your Microsoft account (if it isn’t linked already), and then click Troubleshoot at the bottom of the screen. Hit Microsoft’s Account Troubleshooter FAQ for the full scoop.