VCards, as .vcf files are known, are virtual business cards. The files contain basic contact info, such as a person's name, address, phone number and e-mail address; sometimes, they even include the person's picture. After you create a vCard, you can send a copy to anybody who needs to be able to get in touch with you. Often, the transfer happens via e-mail, and many e-mail programs can read vCards. If you aren't in your e-mail client, however, you can use the built-in Windows Contacts program to open a .vcf file.
Double-click on the .vcf file. It should open in Windows Contacts. If an "Open With" dialogue box opens, continue to the next step.
Click on the "Windows Contact" option in the "Open With" dialogue box. It should be listed in the "Recommended Programs" section.
Click "Open" at the bottom of the dialogue box. The vCard appears.