So you connect to the internet via network cable with your PC, right? Is the behavior of the mobile hotspot the same when you use the external USB WiFi dongle and when you use the internal wireless network card?
I'm connected to the internet via an ethernet connection, and I have an external wifi dongle. I don't know how windows handles the hotspot system, so it could be that windows doesn't even use the external dongle...
Try temporarily disabling or disconnecting the USB WiFi dongle from your PC, re-enable the mobile hotspot using the internal wireless network card and see if the situation improves. You can also do the opposite test, keeping the internal wireless network card disabled and using the external USB WiFi adapter.
I'll give that a try. The dongle isn't a USB one though, it's attached via these two round ports on the back of the motherboard.
Type msinfo in the search box, send System Information.
do I export the system information to file then share it here? is there a way to attach files? If not, I can list out the PC specs required.