Norton 360 caused big problems on Mac Catalina
 

After installing Norton 360 on my iMac running Catalina (after being pestered to do so by Telus), web browsing stopped functioning properly. I tried the various "fixes" offered on the internet, such as things to do in Norton settings, but neither Chrome nor Safari functioned properly. Could not connect to websites. Eventually I deleted Norton 360 from this machine. And now everything works properly.


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