Windows 10: How to reactivate windows 10 product key, once deactivated?

I accidently deactivated it while i was using command prompt (admin). Now, i am unable to access some built-in features & I don't have original product key with me now. Is there any way to reactivate my key?

:)

 

deactivate windows product key

How do I deactivate a Windows product key from another computer? All the answers I found refer to deactivating a product key on the same machine but I can't do that because the the machine was reinstalled with Linux without deactivating the product key.
My case is specifically for Windows 7 but for the sake of the question if there's a method that works for all versions of Windows that be preferred.

Thanks.

P.S. for the topic category I said activate since I'm looking to deactivate the license so I can reactivate it.

 

Product key was ...deactivated?

I'm not sure if this will help, but I read somewhere that Microsoft deactivated all Windows Insiders product keys up until the 29th and will then automatically reactivate them, I don't know if this will also apply to your PC for after a day we'll just
have to wait and see...

 

Windows 10 reactivation after deactivation

hi

I accidently deactivate my Windows 10 on my laptop . How can I reactivate it ? Windows 10 ist upgraded form windows 8.1 and I don't have de product key or ID.