1. Double click on the .pfx file
2. then you get the box below click on "Local Machine"
3. At the next box click on "Next"
4. in the box that appears, enter the password that was entered when the pfx file was created, also mark "Mark this key..."
5. In the next box, "Automatically select..." should be checked, click "Next"
6. on next page, check your settings and then click on Finish.
7. Importation is now complete