pc wifi issue

Hey everyone I have a very odd problem with my Pc. When I test my wired/wireless internet speeds I'm only getting around 20 mbps download and it varies a lot even on ethernet. I used the same wifi test on my laptop and phone which use wireless and got over 400mbps. This is also a somewhat recent...

So I use a wireless extender to utilize 5G on my PC rather then mess with my router settings, but whenever the extender goes offline, such as slightly falling from the plug, my PC is not able to locate the normal Router wi-fi connect, and is only available when I also have the extender working...