@Erman Hello, Here is a latest chipset driver for Archer T4U/ T9UH : https://static.tp-link.com/beta/2021/202101/20210108/RTLWlanU_WindowsDriver_1030.41.0514.2020_Drv_3.00.0036(26078).zip

@JohnChong978 Hello, Please check my reply on your original post here, thank you.

@JohnChong978 Hello, Thank you for your reply, as you have requested replacement 2 times, another replacement may not help, I doubt it could be the issue with certain computer or motherboard. If you...

@Muzza Hello, Thank you for the update, can login to router and share a photo of the 2.4Ghz WiFi settings? You could create a Guest WiFi on the new router and see if adapter could see the Guest WiFi...

@JohnChong978 Hello, Thank you for your valuable feedback, in the recent post you mentioned ' I had been request for replacement 2 times, but also the same ' . To narrow down the cause, it is...

@bellapupa Hello, Sorry for the late response and thank you for your detailed information. From your description, it could be the issue related to certain computer/motherboard. Intel released a...