Hi, I had a Symantec antivirus and it messed up quite a lot of things on my PC. I don't know this new antivirus Kaspersky sorry? Anyhow, I was told about an antivirus called "AVAST" just tap in on Google avast.com it's completely free and I've been using it for at least 5/6 years now after my problems with Symantec! I also had files remaining from the Symantec programme but when I installed "AVAST" it seemed to get rid of them. I have looked and they're nowhere to be found. Hope this helps?