@centerlinescores check out the list of official clients, there are several windows options (or frameworks that work on WIndows) listed there.
letsencrypt-win-simple: GitHub - win-acme/win-acme: A simple ACME client for Windows (for use with Let's Encrypt et al.)
Windows (.net) client: GitHub - oocx/acme.net: A .net implementation of ACME (Automatic Certificate Management Environment)
complete list: