Windows Essentials Security?

I had to reinstall Widows Live Mail along with other things after a major repair.   My personal folders did not come back and really got not help from Microsoft they gave me a link to a site for Windows Essentials Security?  which I opened.  During the download process there was message about having to remove Norton as it will conflict.  I did not do this because firstly I spent over 2 hours with someone from Norton reinstalling AntiVirus and secondly because I paid for it.

Does anyone know what this program is and do I really need to to take Norton off the machine?   Does anyone know how to get my folders back?