A security certificate is a small data file used as an Internet security technique through which the identity, authenticity and reliability of a website or Web application is established.
This article describes how to import a signed end user certificate and a CA certificate into the MS Windows local machine (My Computer) certificate store.
Importing a signed certificate into the local machine certificate store
EXAMPLE: The PKCS#12 format with extensions .pfx or .p12.
Importing a CA certificate into the local machine certificate store