So, I've been having this problem for a while and was wondering if there was any link between the two. Every time that I've plugged in another USB receiver for, let's say, my wireless headphones, the internet quality decreases by a LOT (it sometimes just straight up DC's). This is a problem because I cannot use my WMR headset controllers (or anything different that's wireless) and using my internet at the same time. Is there a problem in the Wi-Fi USB adapter itself or should I consider getting a wired internet? I've had this one for a while. The USB Wi-Fi adapter is called TP-Link TL-WN722N. Will provide more info on anything that's needed.