prabs,

Thanks for all the details. That helps.

If you have Malwarebytes real time protection then that is definitely a potential problem since it means you have two active in the background security programs running at the same time.  That might be indicated by it disabling one part of N360.

Normally we recommend that if you need to scan and deal with something that has gotten through the Norton defense then to use the free versions of MBAM or SAS not the paid for versions.

Someone posted recently that you can disable the real time scanning of MBAM and juset leave it installed to scan when commanded -- could you do that?

I'm not sure about conflicts with NSW -- is it the standard or the premier version (the latter includes Norton AntiVirus). Note that Symantec have discontinued NSW as a product.  http://www.symantec.com/norton/products 

Since some of the utilities in NSW are duplicated in one form or another in N360 I personally would uninstall NSW.

Unless someone with direct experience with N360 has suggestions -- give them a little time to catch up after the weekend -- I would download and run the Norton Removal Tool and least twice with restarts after each run

This link: Symantec Norton Removal Tool. will direct you to the current Symantec Norton Removal Tool.

and then I would install N360 V4 using this link which is the latest version:

New N360 V4:

Click on the link that matches your version:

Norton 360 v4 Standard: www.norton.com/n360s_4  <<== the version with 2 GB of online storage

Norton 360 v4 Premier: www.norton.com/n360p_4    <<== the version with 25 GB of online storage

Check for a while that that is running OK and then see what is suggested about the NSW.