Windows 10: I purchased several unused windows 10 licences @begin of covid, built back up machines not...

I won't be finished building my new machine for at least several days, How long do I have to register my existing Windows 10 KeysI built two backup machines during beginning of Covid one intel based one AMDI am currently building a new custom top end Intel MachineI hope my $100+ each license's are still good

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Windows 10 licence

I am getting an unused pc from a friend with Windows 10 installed with the licence linked to his account, is there any way to link the licence to my account as he no longer has a need for it as I have the machine (no changes to hardware are made)

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

OEM Licence -Windows 10

I have just built my first machine and purchased a copy of Windows 10 from my local supplier. It is an OEM version supplied on CD. It installed without any issues but is now asking to be activated. It did not come with a validation key, so am I now
expected to purchase a licence from Microsoft or how do I validate it?