I want to use WinRM with https transport. I've bought a Comodo certificate (the error states I cannot use a self-signed certificate) with the Subject matching my FQDN (Full computer name in System)...

I've noticed a subtle difference in how OpenSSL and Microsoft certreq generate PKCS10 CSRs: OpenSSL: -----BEGIN CERTIFICATE REQUEST----- Microsoft certreq: -----BEGIN NEW CERTIFICATE REQUEST--...