@Tony Reset to factory, still the same. I'm coming to the conclusion it must be Windows 10 - it usually is :-) Thanks for the help, Cheers, John

@Tony That's the weird thing, nothing has been changed.

@Tony Hi, It is all the time and perminent.

Hi, the other day my network speed dropped from 112mbs to 11mbs on my connection from Windows 10 PC to Synology server. I've reinstalled the firmware on the server, cannot trace any changes on the PC...