This procedure describes the procedure to download CentOS as the OS for running in a virtual environment. If you haven't installed Hyper-V yet, see Install Hyper-V on Windows 10 (https://qiita.com/bitterrich/items/899c751eb7e79ebdbaca).
The screenshot uses chrome. The screen is as of April 2020.
https://www.centos.org/download/
Click on the CentOS Linux DVD ISO banner
Actually, I can't download it by clicking the iso file. It is transferred to the mirror site to save bandwidth, but can be downloaded by following the same directory hierarchy again at the transfer destination.