XPS 8940, uninstalled Dell bloatware keeps reinstalling itself after reboot

Does anyone know how to permanently get rid of the various Dell and McAfee apps that plague my system? Particularly McAfee and Dell Partner Promotions. Though I would really like to remove all of them.

I tried following the instructions in other posts. Eg. Add/Remove programs, Terminated app then Uninstall app. They disappear from the 'Program Files' folder but on reboot they all reinstall. It is really irritating and I don't know where they are reinstalling from. 

Aside from the significant amount of memory these apps seem to consume and unknown performance hit to the system I am also not thrilled that I have paid $2500 for a computer with advertisements built into Windows! (Dell Partner Promotions)

Dell please take note! Bloatware, Adware or any other unwanted software for that matter that re-installs its self AFTER it has been intentionally and repeatedly uninstalled/disabled is MALWARE! Initially I was reasonably pleased with my new Dell but this has seriously irked me! By all means pre-install bloatware on the system, some people seem to like it, but making it hard/impossible to remove is a great way to permanently lose future customers!