I have dowloaded McAfee Internet security suite as part of my ATT package. I also downloaded Mcafee security Scan Plus. The question--do I need both or is the Sec. Suite enough?
No you don't. Security Scan Plus is merely something that scans and tells you what software you need - a sales tool in other words. It is an optional download with other software, Adobe products for instance.
You can uninstall it in the normal manner via Control Panel > Programs.