This is a doc describing how qualifying students can download Windows 10 from the Campus Software Library
Begin by visiting software.wisc.edu and selecting Login to the Campus Software Library
Next select the institution that you are affiliated with and log in with your NetID and Password.
Select Microsoft For Personally Owned Computers.
Scroll to the bottom of the page and select Microsoft Windows 10 Education for students. Selecting this link will prompt an email to be sent to you with a download link and key within the next 24 hours. If you do not see the email in your wisc email account contact the DoIT Help Desk by visiting Get Help from DoIT.