|By Windows Security - do you mean Microsoft Security Essentials and Defender or something else. Note: nowadays their a lot of fake anti-viruses that can be called and look like standard windows applications.|
Maybe thats why it says Windows Security is infected.
I'm using Microsoft Security Essentials on one of my PCs - it works very reliably. Several times it saved my PC.
I personally do not like Mcafee, Norton etc etc. All this heavy antiviruses doesn't seem to provide "heavy" protection. Even Avast seems to be better...
;) Security Made Easy ;)