1. If it is a management route, it is suggested to change a router with QOS management function and allocate bandwidth in the router, so it is useless to use software to limit these tricks.

2. Set the MAC address filter, so that the person who limits the network speed can't get online, and he will find you. You can go and give him a lesson, and then untie the MAC address.

I totally agree with the method of liyegui20 10. If he dares to speed limit again, you will forbid him to surf the internet again.

Enter the router, enter an option of DHCP server (some routers don't have it, keep looking for the latter one), and enter the client list. These show computers that are turned on and connected to the Internet, with the client name and the corresponding MAC and IP.

Look for the MAC address here.