My worst latency issues (and I've had several debilitating ones over the decades) were nothing more than overzealous anti-virus programs. Some update must have

My worst latency issues (and I've had several debilitating ones over the decades) were nothing more than overzealous anti-virus programs. Some update must have done something to break the program, which had otherwise been running quietly in the background for 3 or 4 years. I think others were temporary ISP issues, and maybe once I even had to replace a wire? But they've always been a nightmare to debug.