Question Very low internet speeds on one device ?


Jan 9, 2015
As title I have very low internet speeds on one device. This started about 2 months ago and has remained ever since. With other devices I consistently get speeds of around 50-60 megabits per second but on my pc it is usually around 1-3.

spec information
Router: BT Smart Hub 2. Provided by BT
Modem: ECI C-Series. Provided by BT
Motherboard: STRIX 7270E
USB Wifi Adapter: ARCHER T2U Plus
OS: Windows 10 22H2
ISP and Type : BT, Fiber
No of devices: 4 (PC, Laptop, Phone and Tablet)

now I have tried a number of things to no effect. I will list what I have attempted

reset router
update drivers
uninstall and reinstall drivers
netsh int tcp set heuristics disabled
netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global rss=enabled
netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns
Clean Boot
BIOS Reset
Open DNS
Contacted my ISP
I have replaced my USB Network Adapter

sadly none have improved my speeds. I am stuck for ideas and haven‘t been able to find any online and I was hoping a kind soul could give me some direction.
Last edited by a moderator:
Where you using the same kind of USB adapter before.

The one you are using is pretty much the worst possible choice....well I guess you could have bought the $5 clone ones on amazon.

These small USB devices favor portability and battery savings over performance. This means small antenna and lower power output. A desktop machine makes this even worse because the large metal case blocks the signals even more.

You could try a USB extension cable to move the adapter away from the PC. Maybe move the pc next to the router to see what your best case performance is. Wifi is extremely hard to say all the diagnostic stuff is locked up in the wifi radio chips with no access by end consumers.

You have very few options. You could try to force 2.4 or 5 radio band since they tend to have difference coverage. You could try other radio channels but since your other devices are not affected it may not matter. It would if your pc happens to be in a area with more interference on those channels. This is what makes it so hard because your house the room you have the pc in make far more difference than most settings you could change.

It is unlikely you have 2 bad adapters but wifi adapters seem to go bad more than other computer electronics for some reason.

If you were to buy another device you want to look for a USB adapter that is designed for a desktop. Most these are physically larger and sometime have external antenna. They also tend to come with a USB extension cable and a way to mount the device away from the PC.


Jan 9, 2015
This is not my original adapter. I bought the cheapest one I could get delivered rapidly just to test if it made any difference. I am not sure how to find out what make and model my original adapter is because it doesn’t appear to have any markings on it other than ASUS and I got it free from a friend. The original however did have quite a long extension cable.

However when connecting to radio band 5 the new adapter seems to produce better speeds. Still not in the 50-60 range, but 6 - 8 is an 100% improvement at least.
unfortunately also seems my original one doesn’t have dual band capacity. Would that mean it could not connect to radio band 5 at all?

moving my PC closer to the router is not really possible giving my living situation. In addition the router is located directly behind my PC, though with a wall in the way.

I will look at other, desktop specialist, adapters. see if that makes a difference.