Hi. My name is Drew. I'm sorry to hear you're having trouble. Can you please tell me exactly what you're seeing, any errors you're getting, and why you think there's interference?
Do you have any wifi issues when using your computer? Things like web pages not loading or loading very slowly, missing pictures on web pages, anything that claims "timed out", etc.? If you don't have any issues with your computer and wifi, then I highly suspect the issue with the fire stick is elsewhere.
Hmm... That just seems weird. As I understand the Firestick, it should be just like any other WiFi device on your network. It shouldn't break everything.
Being as I don't have a Firestick, I will opt out and open this up to other experts that may know about this issue. Good luck in getting it going.
Hi there and welcome
I want you to test on different wireless channels on the router please as this can be an issue. You have to test on channels 1, 6 and 11 to see which gives the best results.
To change the channel, click on my link below and follow the steps.
Test on each of the 3 channels and tell me if this improves it please.