True Symantec has a lot of false positives and a config change could lower it but still would be very high .
for a basic av I would recommend kaspersky or Eset
Between these eset has even lower false positives by default and kaspersky is stronger by default (kaspersky still has way lower false positives then defender especially among Gray soft )
Comodo internet security in default is excellent...
antivirus is good;
auto-containment is also antilogger (protect use against spyware of type keylogger, screenlogger...);
You can installer the comodo secure shopping;
and is free...