I have attached a diagram showing my home network to make this easier to explain. The area in the dining room where the PC is located will randomly become a bandwidth deadzone, but only for some devices. By this I mean that the actual WIFI signal strength remains strong, but there is no bandwidth available, so nothing works, speedtest will show download speed of almost zero, although upload speed will be fine. It will affect the PC and my mobile phone, but my wife's mobile phone will be unaffected. We also discovered the the Wifi repeater is not affected by this issue, which is used for the printer to make it wireless. If we plug into this with an ethernet cable, it is still nice and fast.
I have used a wifi scanner to look for interference, and there is none, neighbours are on a different channel. I have tried turning off everything else in the room, including the repeater, so that is not causing interference.
I have replaced the WIFI dongle on the PC, so that is not the cause, but then as I said, it affects other devices randomly as well.
Doing some tests with my mobile device, the dead zone is very precise. Standing in front of the PC, no bandwidth, If I take 2 steps forward and stand at the bottom of the dining room at the doorway, suddenly it is back to normal and I am getting 20Mbps.
Your repeater is in the worst possible location. Have you tried putting it in the study? I know you say you have a strong signal everywhere but maybe just try this.
Since the issue occurs with the repeater unplugged and turned off, that obviously is not the cause. Moving it would therefore make no difference and make it completely useless anyway as it would Then no longer be possible to connect my printer to it which is its sole purpose.
One simple answer but may not be what you want to hear get a usb extension cable and move the usb reciever for the computer it may just fix the problem without putting your hair out.
I have seen a window stop wifi before the window had a metal film in betwwen the glass plains.
Currently, the plugging into the repeater with an ethernet cable has provided a workaround solution, I am just interested to work out what the cause of this problem is.
The thing is that it sometimes works for days without a problem and the fact that the repeater works just defies logic.
Wifi can play ditry tricks on you unseen by you there could be wiring or puming in the walls, the walls them selves could have a metal mash in them. Hard to say the exact cause as each house is defferent.
