Hotspot connection lost to PC every few minutes

My only internet connection at present is via a hotspot on Moto G7 (running Android Version 10) connecting via GiffGaff (which runs on the O2 network). I keep the phone data on 3G as 4G seems slower when the network strength is low. I have had a connectivity problem between my phone and my Asus laptop running Win 10 Home (build 19042.1348) for about the last year. Sometimes the connection is fine running at 1-3 Mbps download but frequently it disconnects. I can often get a reconnection by disconnecting and reconnecting my connection to the phone hotspot on my laptop and/or by running Windows' network Troubleshooter. This disconnection happens every 3-10 minutes so having to reconnect 10 times an hour is not unusual. I would be grateful for two things: Firstly if there is an obvious solution I would love to hear it; Secondly I am unfamiliar with this area and would be grateful for a recommendation of diagnostic tools. I emphasise this is a problem of connectivity between the laptop and the phone via wifi. This is not a problem of the network to the phone. Thanks for your time.