You could try this driver I packed, it was updated in 2017 and improved my T4UH's speed....

I've looked around for other people, and there is no newer driver I am aware of. https://support.lenovo.com/us/en/downloads/ds041617 You could try this, I think it didn't work for other people.

Hmm, maybe disable 2.4ghz on your router if you don't use it. Also, make sure to forget or delete the password for the 2.4ghz network and make sure the 2.4Ghz network has a different name/SSID. For...

Microsoft driver works better than TP-Link driver, but I found it slowed down the speed. Try this if you want to, but if the Microsoft one should be fine....

Try out this driver. https://sites.google.com/a/vhhscougars.org/johnsearch/searchindex/archer_t4uh_v1_171121 Might help, but seems like you have a deeper network issue.

Try this driver, should fix the issue. Compatible with Windows 10. http://forum.tp-link.com/showthread.php?101991-Archer-T4UH-V1-T4UH-V2-T9UH-Driver-Unofficial-Version-171121-Windows-32-and-64-bit