Upgrading switch is a good idea. Hardwire all clients if you can.
I would also check firewall and antivirus program settings on the main computer.
Also make sure that your internet is working well.
The internet connection has been an issue at times and we are switching to a new ISP.
I am really not the most technically savvy person so when you say "check your firewall and antivirus settings"--what do you mean?
We have our firewall to the main computer off??? We have tried several antivirus softwares and all of them slow it down. What is actually recommended?
Thanks again
Christian
Neurology