KDC - Kaspersky Virus Database File is a file extension that is associated with an anti virus application known as Kaspersky. It is just for Windows operating systems. It can definitely help to protect your computer from unwanted viruses, Trojan horse, worms, and other software that may be malicious. You will need to make sure that you have the .kdc file installed on your computer for detecting these viruses. You can always add this extension if you want to advance your protection. It can work terrific to give you exactly what you need. There is nothing better than having a virus protection that can make sure your computer stays out of the way of harm. This is the perfect step and you can download it online.