Thanks difarn Everything is okay now. I failed to realise usb3 needed drivers.
What didn't help was that I have had a Microsoft Wireless Mobile Mouse 6000 for six months and it doesn't work properly. I had thought it was the set up in my old machine but it behaves the same way in the new one so it is going back to Amazon.
Other mice are now working fine and I have not put their individual drivers in yet.
Glad you have resolved the situation. It may be that the receiver of the wireless mouse is sensitive to interference and would work if you did have a short usb extension - I have had a mouse that preferred to work like this.
Another point worthy of consideration, is that the front USB sockets are not direct from the board, but via cable, which might give a lower 'power' indication to the device being used. That is why,when using USB hubs, it might be better to use a 'power hub' and not just the manual type.
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