And what to install? If your laptop is Win7, 8.1, 10, antivirusnik is already installed. Of course, I mean Windows Defender built into the OS and having though not too extensive, but is sufficient for most applications functionality. I feel that it works not worse than other widespread anti-"watchmen", and the processor load is significantly reduced.
But you can disable snapping. exe files to the media center is still needed. And the first thing on this path is to try is what is described here