Windows 10: Windows activation restore

I've never had a MS Account. Yes, the hardware ID of a PC with a digital license is stored on the activation servers. A clean install of the same edition, Home or Pro (the license is only valid for one edition) will activate automatically.

 

how many times I can use windows and office activation/digital after clean install??

:)

 

Windows 10 Activation Backup

There could still be a need to backup and restore windows activation.

I work in a PCN environment with Windows PCs that will never go online. Is there a way to backup/restore Windows 10 Activation without having to re-do the phone/smartphone activation?

 

How i can restore my previous product key

I have changed my Windows 10 product key accidently while experimenting, on this key windows isn't activated.

I want to restore to my previous Product key which I had lost, is there any way to restore previous product key to activate my laptop's windows

 

As long as you don't change the hardware overmuch, you've been issued a "digital license," and you've tied it to a Microsoft account, you can do this as many times as you want. The official rearm count is 1001 when you start out, but I've never had this refused, even on heavily and frequently rebuilt test machines.



The key phrase above is "Windows is activated with a digital license." Also, from what I understand, the Hardware ID is what counts, so the Microsoft account makes it easier, but is not 100% necessary.
HTH,
--Ed--