Solve transfers very little data so I don’t think the 3-10 users will be noticeable on your network.
sloughwi is correct - Add-ons are the first thing to look at (they can really interfere with normal operation of the browser). Starting the browser in safe-mode will help determine if this is the case.
Another area to look is your anti-virus software. Most have an option to do real-time scanning of web content. Simple add *.solve360.com to the list of safe sites or disabled this feature.
Over the years we’ve also discovered that if you are using a router with a feature called “stateful packet inspection” often called “SPI” or simply “Firewall” enabled we’d suggest disabling it. The filtering slows down the network noticeable and does almost nothing to enhance security.
Then there’s the simple open a command prompt and run: ping secure.solve360.com -t (enter) to measure the network response time from our service to your location. A typical range should be 150-300 msec with no time-outs.