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 2020-03-23 09:00:28
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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1 Accepted Solution
Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version-Solution
2020-03-17 18:20:43 - last edited 2020-03-23 09:00:28

@Kevin_Z 

 

The lastest windows updat has fixed my problem. All is good now. 

 

Thanks for a great product. 

 

Peter

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15 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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Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2020-01-23 19:55:17
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Rkgr on ŠöüĝT2UH after upgrading Windows 10 OS version
2020-01-27 19:05:33

 

Kevin_Z wrote

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-S

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Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2020-02-04 00:09:04 - last edited 2020-02-04 00:16:58

@Kevin_Z 

It seems i've  fixed it for the moment.Until now i had my 2.4ghz and 5ghz connection share the same name and password and set the router up to filter my pc to 5ghz only,but i have changed the name of the 5ghz connection and password and allowed my pc to connect to both 2.4ghz and the 5ghz and it seems that this did the trick.However if this fails as well i will come back,now to respond to your questions:spotify premium

1a.I didnt bought it already finished i bought the pieces myself and assambled them myself.

1b.3-4 years ago,until last year i used my laptop but when my laptop finally died i started buying new parts such as ram and a gpu,at the time i couldnt afford to buy a new cpu and motherboard as well so i had to buy an old cpu and a old motherboard.

1c.My dad brought the case the cpu and motherboard were second-hand and  the rest i bought brand new.

2.Clean install of win 10

3.Dell

4.I did installed norton several times but i ended up reinstalling the windows for various reasons.

5.Yes

6.Windows 10 Pro OS Build:15063.726

 
 
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Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2020-02-11 21:10:17

@Kevin_Z 

 

I just got my adapter today and I am having the same problem. I can connect to my 2.4, but it does not even find my 5g service. The adapter can find and see all the other 5g in the area. So I do hope there is a fix coming. 

Kevin_Z wrote

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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Re:Failed to connect to the 5GHz with T2U/T2UH after upgrading Windows 10 OS version
2020-03-11 01:51:40

@Peter1959 

Hello, what's the model number and hardware version of your adapter? 

 

What's the distance between the adapter and the router? You can try to change the router's 5G channel to 36,40 or 44, change the channel width to 80Mhz. Then restart the adapter.

 

If it still not working, reinstall the driver. 

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