hello I have Norton installed on two pc and my laptop all running windows 10 with the 1511 update. Norton version 22.5.4.24 now my problem is windows defender is still running on 10 but on windows 8.1 defender was always switched off by Norton. I have always been told that having two antivirus running was a bad thing as this causes conflicts. I have tried uninstalling Norton loads of times but still not fixed. I am always getting updates for defender which I never got in 8.1 with Norton installed. I have tried going in to defender in settings and its switched on and greyed out and cant turn it off. does any one know how to fix this please.I need this sorting as I have lately been getting a pop up sometimes when changing web pages asking if I want to leave this web page with two options asking stay or leave I asked on windows 10 forums and only answer I got was its a virus. I have done loads of scans with Norton and power erase and Malwarebytes and Microsoft malicious software removal tool all come back clear all done in normal boot and safeboot thanks in advance