Who provides your internet access? I doubt you have a modem at a medical office with 25 employees. The first place your service comes in, you should have a switch, router or firewall. Tell your IT guys that you want them to run speed tests through each of your wireless access points, each of your hardwired points, and then at the point of service entry. Then tell them to isolate the entire office from that entry point and run the speed test again. Then start adding segments of the office back in until the speed dumps again.
I've seen two people streaming video on powerful laptops take down a 500 computer operation to a crawl.
The next time you see your network running slow, just walk around and ask anyone if they're on the internet. Ask them one-by-one to close their browsers, then test the speed again. You may be surprised that its just someone watching Martha Stewart making a dinner.
Or just have someone run the speed test while you walk around and power-down each computer, one-by-one.
You may have a virus, malware, etc... but I'd try finding the web surfers first.
Or, your medical software-to-server communications could be the cause.
There's a bunch of tools out there that you can use to sniff the network.
But, in reality, in a medical office owned by a corporation, I'd be really surprised if each and every one of your computers aren't locked down to a specific port in a vlan on a managed switch. HIPPA laws are pretty strict and I.T. is famous for having a young someone at the top pulling a "look what I learned in school" and locking down your sytems to the point of being useless and you not being able to troubleshoot squat with the exception of turning off each machine and seeing if the problem goes away.
By the way, I'm not a PC doctor, I just played one for 25+ years until I decided I hated computers since they lost all their moving parts, and switched careers back to machinery maintenance.
Get back on your tractor. :laughing: