To open encrypted media files, the certificate with which it was previously encrypted needs to be installed on the client PC.
The certificate must contain the private key.
Step 1 - Right-click on the certificate which contains the private key and was used to encrypt the media files and select Install PFX.
Step 2 - Select Current User to install the Certificate for only the current user or Local Machine to install the Certificate globally for every user on the computer.
Step 3 - By default, the location is filled in for the current file. A different file can be selected by clicking on the Browse... button.
Step 4 - Type in the password for the private key. When the certificate is exported with the private key the wizard asks for a password to protect the Certificate. Enter that password here.
Step 5 - Select the Place all certificates in the following store option, then select Personal.
Step 6 - The summary page should look similar to this:
Step 7 - After clicking on the Finish button, a popup informs the user that the import was successful.