@DylanW 

Hello, when you try to connect to the wireless network with this adapter, was there any error message, such as incorrect password? Or it didn't ask for it?

Try to disable the Wi-Fi, then enable it again, and check again.

BTW, you may try to remove the driver from the CD, install the latest public driver on the Windows 10, then check again:

https://static.tp-link.com/2019/201911/20191129/TL-WN881ND V2 windows 10 RTL driver 2024.0.4.208.zip

You may remove all the other drivers for this adapter on the computer, then install the above driver manually:

https://www.tp-link.com/support/faq/920/

I hope this helps.

@DylanW 

When you try to connect to the wireless network with this adapter, was there any error message, such as incorrect password? Or it didn't ask for it? Please check if there is any wireless filtering which may block the computer to connect on the wireless router.

BTW, does it connect to any other wireless network? You may try to enable the Wi-Fi hotspot on a phone, then check if you can connect to that hotspot on this computer. If yes, that means there is nothing wrong with the adapter itself or the driver, but there might be limitations on the wireless network that you are trying to connect. It is suggested to modify the wireless settings on it, such as wireless channel, channel width and sec.

@DylanW 

Thanks for getting back. Can we have the driver version as well as the system info of the Windows 10? You may get those by referring to this article:

https://www.tp-link.com/support/faq/2722/

If possible, it is suggested to try this adapter on another Windows computer, check if the issue persists.

BTW, to locate this issue and try to fix it, we would like to follow up on your case via email. Please check your inbox and provide the information that we need.