Norton 360 error

Hi,

 

I have two versions of N360 running.

I have run remove and reinstall.

Two copies of N360 are still there.

Cannot delete either using Windows task manager.

It really slows down my W7 laptop

Any suggestions ???????????

 

I then got Error 8506, 421 which N360 said has been solved

on 2nd run but did not say what was the problem.