https://www.sslforfree.com
Get 3 files CA_bundle.crt,certificate.crt,Private.key
http://slproweb.com/products/Win32OpenSSL.html
Win32 OpenSSL v1.1.0e Light
http://slproweb.com/download/Win32OpenSSL_Light-1_1_0e.exe
Install OpenSSL
C:\OpenSSL-Win32\bin\openssl pkcs12 -export -out C:\Cert\certificate.pfx -inkey C:\Cert\private.key -in C:\Cert\certificate.crt -certfile C:\Cert\CA_bundle.crt
Export a new pfx
