Kaspersky

If you are using an outdated version of Kapersky, that could be the reason you are not being protected, A/V programs MUST be kept up to date in order to prevent 99.9% of virus, trojans and malware from getting into your system. Once they are there, they are a pain to remove.

I would use one of the free home user AV programs like aVast or AVG Free.

I use both on a couple different comps and they work fine, scan regularly and update daily.

Good Luck with your issues.