Computer Help and Support

Do you have the activation code, like on a sticker? Conversely if it's a digital cert you should be able to associate the activation with your Microsoft account (which even if you don't want, is a good idea with W10) and activate that way after a fresh install.

The only trick, as I'm sure you're handy enough to know, is to make sure you can get the driver files for everything. Chipset, wifi, video, sound, camera, touchpad, etc. I'd grab all those first and put on thumb drive.

Then just D/L windows installer to a(nother) thumb drive and scorch the earth (format) and install a bone-stock W10.

Sure I'm not telling you stuff you don't know, but ... I'd never use the Windows that came on my lappie.