My wireless router (MI424WR-GEN2, firmware rev. 20.21.0.2) routinely drops wifi when downloading a large file. Yesterday, I tried to download a DVD, I was not able to download it. My radio kept getting turned off. All I have to do is start downloading a DVD, and my wireless radio will get turned off. I have to powercycle the router to get it working again. This happened three times. So, I contacted tech support.
Tech support told me that I should do a factory reset on my router. To do this: Press and hold the RESET button (on back of router) for 15-20 seconds then release. The power light will start flashing green (if orange, power router off/on and try again). Once the Internet light is back to green, the connection will be restored. I did not do this yet, since I wanted to backup my router configuration, but for me, this is the next step.
I doubt that my problem is a configuration setting in my router. So, a factory reset will probably not fix my problem. I suspect a faulty wireless radio in the router.