Wipe it and reinstall from the installation media.
IF you have had Windows 10 Home installed and activated on the machine, you should be able to do a custom clean install without any problem, although I'm not positive how or if the enterprise eval will impact it or not, but probably not.
The installation media can be obtained through either of these two resources.
Once you have the ISO, you can use ImgBurn to burn it to a DVD or Rufus to burn it to a USB ThumbDrive, either of which you can use to boot your computer and perform a custom clean install.
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