How to fix Ethernet speed being stuck at 10 Mbit in Win10?

Solution 1:

1. Right click your network icon in the taskbar and select network and sharing center
2. Select your Ethernet connection
3. Select "Properties"
4. Select "Configure"
5. Select "Advanced"
6. Find Speed and Duplex, it may be on autonegoation, force 1 Gbps Full Duplex

7. Press OK
8. If you experience cable missing or undetected network, reconnect the LAN cable, or try another port on your router

You should now have 1 Gbps.

Solution 2:

If the cable quality is not up to par, gigabit Ethernet will often fall back to 10 Mbps rather than 100 Mbps. As such, it’s worth checking that your cable is cat 5e or better, the connections are secure, and your cables aren’t damaged.