My Norton AV is almost out and I can get McAfee AV free with Comcast, so I thought I would download it. But I wanted to keep my Norton for the rest of the subscription, and just disable it to make sure I will like the McAfee. When I went to download it, it told me to uninstall and completely remove my old anti virus before installing. So, I didn't download it, but I want to find out if I can just disable Norton, try the McAfee until the end of month when it runs out. Can I do this safely, or must I just uninstall Norton first?