@Ivaylo It's a lot - currently 11 of which 5 are active. What is annoying is that there is an 'always on' option in the manual.

@paulcanning 

They are not too much, the router will handle these for sure.
On the bottom of the device there's a sticker with information.

Can you check what's the HW revision of that device ?

You can browse through the WebGUI: Advanced=>System Tools=>Firmware Upgrade and take a screenshot of 'Device Information' section.

Can also you make a screenshot of Advanced settings here:

@paulcanning 

@paulcanning 

According to the screenshots you've sent, you have VDS/ADSL router TD-W9970 HW v4 (not Archer C50):

Here's your user guide.

Here's your internet connection settings:

Make sure your wireless settings are set like following:

During drop outs observe the device logs:

@Ivaylo That's right. Sorry for getting that model wrong. I have changed it back to 'auto' with the default settings as in screengrab from you.

@paulcanning seems better immediately. *prepares to open champagne emoji*

I've updated my previous post, follow the directions and get back if you observe anything abnormal in device's logs.

@Ivaylo I will do that if it drops out again. Thanks again so much for your help. Appreciated.

@paulcanning It has logged me off a couple of times but then been able to manually reconnect. I have saved the logs but what stands out both times is an ' NCSI response check succeed', which I believe is my Windows. So I will see tomorrow if it is now just me.

@paulcanning Hi. Multiple disconnects/reconnects/unable to connects reported today. I can't see anything obvious to me in the log.