We have many PC’s come into our lab with multiple antivirus programs installed. This usually occurs when a client purchases a new notebook or desktop PC and “Free” (limited duration licenses that require paid renewals) are installed. Important – only install one antivurs program on a PC – otherwise the PC will become very slow and even sometimes unstable in its operation. We like the built-in and FREE option for our clients which is Microsoft Windows Defender best. Other good choices are Norton Antivirus and McAfee Antivirus. The moral of the story – select one specific antivirus program and uninstall all the others – your PC will run faster and more reliably. And if you do not feel comfortable messing with all this – contact us and let us do it for you.