None is great. Norton can slow down pc, also keeps distracting user.  Some anti virus software are itself considered virus. best strategy: (1) use up to date Microsoft Edge browser only.  Do not use more powerful and risky Chrome or outdated browser  (2) mindful of phish or suspicious looking websites or pop ups. Do not click arrow link or run on website when not sure what it is actually running. (3) do not download any driver that is not genuine from original device company such as nvidia, amd, or Dell. (4) do not auto save password on pc (5) back up doc/photo on secondary data storage drive at regular interval.  keep all apps on primary drive.  do not install any program in storage drive. when pc is accidentally infected despite best effort to stay healthy, wipe boot drive and do a clean install.
Which Anti-virus program works the best for your Optiplex Desktop and why? For more questions regarding this contests, please visit the Contest Information Page here.
DS 07/20: Which Anti-virus program works the best for your Optiplex Desktop and 
why?