I opted to have two OS on my PC, one for Internet access and general daily PC activity and the other solely for music application without internet connection etc. The internet is simply deactivated on the music system so I can access the web if i need to authorise new applications etc; however this is for a very limited period of time and largely based on the assumption that the websites being used will be trusted, official software develolpers etc and unlikely to be riddled with virus threats. The drawback is that i have to switch OS depending on what i want to do, for example I can't write music whilst chatting to peeps on here

. ON the plus side though I dont have any process zapping antivirus eating into my music production which was the whole point for me. Hope this helps.