Intermittent dropped signals.

I bought this router in October of 2017. I have been very pleased with it until just recently. After 7 months of use, I am now experiencing dropped signals when streaming various programming to my Fire TV. I have several Fire TV's and it happens on all of them. In the middle of watching a show, the program drops out and returns to the Fire TV home screen. It seems to be an intermittent problem. I'll look and see if I have the latest version of the firmware installed tonight. Hopefully its not to difficult to update. Any instructions will be appreciated. Updated the firmware, will have to test it out to see if there are any further issues.

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