Definitely. As a developer, I was totally fucked by one of our customers' antivirus software. That AV software has very poor performance. It significantly slow

Definitely. As a developer, I was totally fucked by one of our customers' antivirus software. That AV software has very poor performance. It significantly slows down the DLL/file loading. And the firewall component just simply add delay to all HTTP requests. The “Exclusion” function is also useless as expected. It cost me a lot of meaningless time to investigate the performance issue reported by customers. And you cannot even imagine that as an AV software, their self-protection component is running as a simple Windows service. You can easily disable that by setting a wrong user account to that service. After restart, you can do whatever you want. Honestly, if I am the one who writes virus. I would give credit to the company who make such poor antivirus software and sell to thousands of customers. They do make life easier.