Consider using a good UPS with voltage control for your modem and router as that may be the issue. Interference with other devices may also be an issue.

It is recommended that you get separate Modem and Router instead of the Gateway Combo model as they tend to have more issues and harder to debug if you have issues later. Many people have specific...

A shot in the dark... If your PC is using bluetooth, it may be interfering with the WIFI signal. Also try your PC in a different location to see if it is something else interfering with the signal.

Power cycle your modem, PC and router is always a good start. Connect the PC direct to the modem bypassing the router to ensure the issue is in the router before replacing it. The issue may be your...

Do you have the issue if you connect via WIFI? I would connect the laptop directly to the modem bypassing the router to insure the issue is in the router/PC connection. Check the PC for malware. Next...

if the default userid and password does not work, then it is time to reset the router to factory specs. See your router manual or google for your specific model for instructions. After the reset, you...