Did it come with win 10 pre installed? If it did, there is a good chance the license is tied to the motherboard and big OEM like Acer have special licenses that are tied to motherboard, and cannot be moved. If that is the case, you will need to buy Win 10 again.
Have a look in settings/update & security/activation
if it says "Windows is activated with a digital license" then it is currently tied to motherboard
If it says "Windows is activated with a digital license linked to your Microsoft account" then its attached to your email address and you can move it to a new motherboard.
If it is tied to motherboard, try the 1st step of this and see if you can tie it to an email account -...