Kaspersky is a real good AV. Just make sure you don't have 2 AV's or 2 firewalls running at the same time. If you have a 3rd party firewall, then make sure windows firewall is turned off.
If you get tired of paying for an AV, I would suggest Avast Free and Comodo Pro Free firewall, they both work great together.
You may want to try this:
Download Avast Free to your desktop, install it and let it do a bootscan on reboot. Move everything to the chest or delete them, whichever you like. Then you'll see if Kaspersky is missing anything. You may be surprised.
Then after the reboot you can remove avast from start-up and continue using Kaspersky. Or if you like avast, you can remove kaspersky. Avast is the only free AV I know of that catches viruses AS you surf the net. The other AV's have to have scheduled scans. It's up to you
You can find those progs in the red link.
Some HELP in posting on Cnet plus free progs and instructions Glad to Help!