Wifi to laptops not working

[#1]

The past few weeks WiFi has stopped working between my Plusnet Hub One and my two Dell Latitude 5410 W10 laptops.
Both 2.4 and 5Ghz
When I do rarely manage to get something and run a ping test there are mostly failed replies.
My mobile and TV do work although there is some obvious break in signal. Mobile data is fine.
Any ideas what's going on please?

Thank you
Mark


Product name: Plusnet Hub
2. Serial number: ++++++++++++++++
3. Firmware version: Software version 4.7.5.1.83.8.289.1.3 Last updated 06/12/21
4. Board version: Plusnet Hub One
5. DSL uptime: 4 days, 23:04:31
6. Data rate: 8296 / 56578
7. Maximum data rate: 8292 / 59103
8. Noise margin: 5.4 / 4.8
9. Line attenuation: 27.6 / 20.7
10. Signal attenuation: 27.1 / 19.7
11. Data sent/received: 2.4 GB / 82.7 GB
12. Broadband username: xxxxxxxxxcc@plusdsl.net
13. 2.4 GHz Wireless network/SSID: PLUSNET-FWTJ2.4
14. 2.4 GHz Wireless connections: Enabled (802.11 b/g/n (up to 144 Mb/s))
15. 2.4 GHz Wireless security: WPA2
16. 2.4 GHz Wireless channel: Automatic (Smart Wireless)
17. 5 GHz Wireless network/SSID: PLUSNET-FWTJ5
18. 5 GHz Wireless connections: Enabled (802.11 a/n/ac (up to 1300 Mb/s))
19. 5 GHz Wireless security: WPA2
20. 5 GHz Wireless channel: Automatic (Smart Wireless)
21. Firewall: Default
22. MAC Address: 10:10:10:10:10:10
23. Modulation: G.993.2 Annex B
24. Software variant: AA
25. Boot loader: 1.0.0

[#2]

Have you got separate SSID's for the 2 frequencies?
Often helps.

[#3]

Yes I have thanks

[#4]

@s1mps 

Try changing the wireless channels as it could be a neighbour using the same ones. A WiFi  sniffer app, such as WiFi Analyzer, which I run on an Android phone, allows you to 'see' all users of a channel so you can manually pick the one with the lowest activity. Check at both the hub location and where you use your devices.

[#5]

Thanks. I did change channels with no effect. We are a little more congested but nothing like I've seen elsewhere and it's a good neighborhood where you wouldn't expect foul play. I did check connected devices and thinning down my own to try and isolate the problem. No joy tho.
Strange that my phone and TV still work well on WiFi while the laptops don't.

[#6]

There appear to be numerous issues with Dell 5400 series and laptops - have you tried Googling the issue?  A quick search found these amongst many others...

Issue in accessing home wifi network through dell laptop - Microsoft Community

Wifi keeps disconnecting in Windows 10 - Microsoft Community

Do they match your experience?