Cura running super slow on a really good computer in Cura + plugins Posted September 3 I think I figured it out. I was looking at some forums about internet slowing down cura, and apparently cura tries to connect to web printer servers like octoprint. I am on a large wireless network because I am a college student using dorm wifi, so Cura was trying to find all the wireless printers on the large server (there is none), thus slowing it down. I just went to the plugins and deleted the one that has to do with wireless printers. C:\Program Files\Ultimaker Cura 4.2\plugins and delete the one called UM3NetworkPrinting. That instantly fixed the problem, and I dont use wireless printers. If I ever do, I'll just reinstall cura or something to get all the proper network plugins back.