In the readme.txt, it was mentioned that Windows 10 does not support Nios® II EDS Standard edition.
/content/dam/altera-www/global/en_US/others/download/os-support/readme-qp171.txt
However, in what's New in Nios® II, it is supported.
https://www.altera.com/products/processors/what_s-new.html
Nios® II EDS is supported for Windows 10 as stated in What's New Page:
https://www.altera.com/products/processors/what_s-new.html
A correction will be applied to the readme.txt file in future Quartus® Prime releases.