Here are some steps to troubleshoot your lagging or buffering internet connection:

1. Check if your router is plugged into a power source and running.
2. Check your cables for any signs of tearing or fraying.
3. Reboot your modem and/or router by unplugging and plugging them back in.
4. Disable special features like wireless adapters and Quality of Service (QOS) settings.
5. Check your computer for viruses and malware.
6. Check if your browser and Java version are up-to-date.
7. Check your internet speed to make sure it’s consistent with what your provider promised.