Ok. These are the following steps you can try
1. It seems you are connecting through hotspot WiFi but no internet. First disconnect WiFi on your phone. Update your drivers on your computer for hotspot WiFi and try again.
2. Try using hotspot with usb cable from phone to pc. You have to update drivers and follow same procedure as above.
3. If still fails try in another PC and call your data plan provider and verify they are not blocking anything.
https://www.addictivetips.com/windows-tips/fix-no-internet-connection-on-windows-10-mobile-hotspot/[/
I tried updating the Realtek driver and it says it's the latest. I went in device manager and everything in network adapters was enabled. I called straighttalk the other day and they see no problems with tethering or data usage.