You know, there are about 10 channels in the 2.4GHz range.
If somehow your BT device is causing the interruptions in wifi, the wifi channel should be changed.
Do you know how to do that in your router?
Thank you for the files - I just realized that your the one with the Atheros internet!
Try the Admin user account.
Go into the Event Viewer Log and see what other messages you have. They may tell us something.
Try Ethernet.
How often does the wifi go out?
If it is like every 2 hours, run Ethernet for 4 or 5 hours, please.