Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
It depends what you are going to use the certificate for but win-acme will generate a PFX (combined cert+private key PKCS#12 archive) then store the cert+key it in the local machine Web Hosting store.