Well the only way to find if your computer is infected or not is by running a full scan using Malware Bytes software as rightly mentioned ^^. This is a freely available software for download. And it keeps ur computer safe like anything. I have personally tried and tested it several times. I dont trust Norton at all when it comes to identifyin and removing viruses on a computer.
Guitars : USA Fender Stratocaster 1981 Collectors Series, Ibanez RG420eg, Cort X6vpr Snake skin, Custom Tele Style Guitar
Processor : Boss ME 70
Amps: Laney Cub10(4 Sale), Roland Microcube
Recording : Focusrite Scarlett 2i2, Shure SM57
For Sale: Sansamp Tri-AC