Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version

Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2019-07-12 06:12:47 - last edited 2019-07-22 02:00:25
Model: Archer T2U
Hardware Version: V2
Firmware Version:

Hello,

 

It was brought to our attention by a number of customers of a failure to connect to 5GHz that happens after upgrading Windows OS. What will happen is devices are unable to connect to the 5GHz of the main router, while the 2.4GHz works fine.

 

If you are experiencing this issue, please get in contact with our technical support staff. They will be able to provide instructions to help update the driver of the network adapter to solve this.

 

Here is the link to our home support: https://www.tp-link.com/support/contact-technical-support/#E-mail-Support

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5 Replies
Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2019-09-06 20:18:11

Hi. Could you send me that driver because Polish support of your team always send me driver from support page which is publicly available...

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Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2019-09-08 08:48:39

Same for me, please. 2.4 GHz connection works fine, but 5 GHz flaps often, and even when it doesn't, ping time is 3× higher. I hope there's an updated driver available.

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Re:Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2019-09-10 05:50:01

@wojtekka  @post-factum 

 

Below is a driver you can install to give it a go.

http://support.tp-link.com/f/9f6e4443eb/?dl=1

 

While if still the same, it is suggested to contact our tech support to do further troubleshooting to fix it.

 

Good day. 

 

 

 

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Re:Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2019-10-01 11:57:51

@Kevin_Z thanks for the reply.

 

I was unable to install this driver. Windows 10 complains that the hash for the file is missing. Disabling mandatory driver signing via bcdedit doesn't change anything.

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Re:Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2019-10-17 06:45:40

@post-factum 

 

Hello, thanks for your reply. We found that the issue is located on the main router which model number is CH7456LG-LC by analyzing some reported cases, and this issue has been fixed by firmware upgrade at ISP's end. 

 

You can verify the model number of your modem, if it is the same, try to update the firmware and then verify whether you can connect to the 5GHz. 

 

Good day. 

 

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