Unless I am some sort of kaspersky fanboy I will never be too inclined to the idea of using Kaspersky over Norton.
This can confuse your security solution, which downloads new databases, compares them with the system data and considers databases being out of date. To do that, open the product’s settings window and click on the Additional-Proxy Server Settings. If you cannot access any of these links, your PC may be infected with a virus, which blocks access to Kaspersky Lab resources.
Up until a couple of weeks ago, I was using Kaspersky Internet Security on two of my desktop computers only without a single issue, and about ten days ago, I uninstalled the Norton Antivirus from my HP notebook and installed Kaspersky Internet Security as I had a spare license key with me.
After installing the KIS, I activated the product by entering the license key and then manually updated the database to the latest available version.
Installing a security solution is important, however you just cannot assume that you are done there.
Keeping your antivirus databases up-to-date is just as important as the initial install.