Malware getting by Norton 360

I've been getting what appears to be normal upgrade request for common programs that just about everyone uses. But when I execute the install, my Norton 360 reports virus files on my system. I did some screen shots of these install request and will post them if I can. I was able to download using IMCE, but have no idea what happened to them when I minimized the window. They were installs for Adobe Flash Player, Adobe Shockwave,  QuickTime & Skype. I expect others to follow at regular intervals. I will not be installing them no matter how real they look.