Hi Guitar Man,
I'm sorry to hear this. This is currently the latest version of firmware at the moment. Would you like us to send a replacement router for testing purposes to rule this out?
I have been experiencing the same issue with my Wifi hub. I'm finding that Windows 10 PCs lose their Internet connection. It seems that they actually lose their IP address/gateway address (ipconfig shows no IP address). I have to either run WIndows network troubleshooter, or re-connect to the Wifi again. I tried using a static IP but this didn't help. There is something going on in the way the the Wifi hub handles Wifi connections - possible firmware bug?
Devices that are 'wired' connected (either directly or via Powerline adapters) are all fine.
A friend of mine who has also recently moved to TalkTalk is having the identical problem.
My Wifi hub is on firmware SG4K10002808t
Actually, it appears that the upgrade to firmware SG4K10002808t has fixed the issue. This upgrade had been applied automatically very shortly before I checked the firmware version.
It was the previous version of firmware that had the issue.