McAfee SecurityCenter is the name given to the user interface. Total Protection is one of the several packages that consumers can purchase, others include Internet Security and VirusScan Plus.
See the retail pages to see what I mean: http://home.mcafee.com/Default.aspx?rfhs=1&culture=EN-IN
In your computer Control Panel > Programs it can appear either way, as SecurityCenter or sometimes the actual package name.
You would have to check with Dell regarding what package they provide.