18.1730.368.0 DP: 18.1640.368.0

In reply to a post by JMaples:

18.1730.368.0 DP: 18.1640.368.0

See my (edited) post above - these don't look to be current driver version to me.

Try downloading and running the appropriate MSI from the Surface Dock 2 Firmware and Drivers page

I did that and there was no change

Tx. I tried but it actually reduced the speed and I had to restore the settings

Alright but when using Windows findout what is IP that Google reporting when search for What my IP
Then on same system do the same thing but using Ubuntu and then it that IP, is that the same IP number which google reported as when using Windows?

https://www.google.com/search?q=what+my+ip

Tx. Since my last email I have worked out how to suspend Bitlocker which was stopping me booting W 10 in safe mode with networking. There I have found that I get the same results as with Ubuntu. That was the first choice of the Zen engineer but he did not know how to suspend Bitlocker.

In reply to a post by JMaples:

Tx. Since my last email I have worked out how to suspend Bitlocker which was stopping me booting W 10 in safe mode with networking. There I have found that I get the same results as with Ubuntu. That was the first choice of the Zen engineer but he did not know how to suspend Bitlocker.

Well you've obviously made a mistake when you have been doing that as you are adamant it is a Windows 10 problem. I think you need to go back a repeat the test in the hope that you get the slower speeds again so that you can be proved right . . . .

. . . . or you could change the switch from transmit to receive and take advantage of the freely offered advice and expertise from many people around these parts who are well-respected industry professionals who have long track records of offering first-class help and suggestions.

I am not sure how much of the story you have followed but it was the Zen engineer who told me that it was a problem with W10 Power Management and asked me to connect in Safe Mode so that he show me that was the case. We came up against Bitlocker in trying to do that so he made load up Ubuntu to prove his point instead – which he did. Getting round Bitlocker has just proved his point again – not disproved it as you seem to think. I was reporting it because a forum member was asking about an aspect of the Ubuntu connection which, I assume, he thought might lead somewhere, whereas it is now clear that Ubuntu is not relevant.
Which is the piece of advice so far offered by a forum member which you think solves the problem of the slowed speed in W10?

In reply to a post by JMaples:

Tx. Since my last email I have worked out how to suspend Bitlocker which was stopping me booting W 10 in safe mode with networking. There I have found that I get the same results as with Ubuntu. That was the first choice of the Zen engineer but he did not know how to suspend Bitlocker.

That's progress. So you are getting full FTTP speed booting into safe mode? If so this directly points to some other software or driver that is loaded during normal operation....

The usual suspects will be third-party security apps including antivirus, firewall and VPN apps. As you've said previously that you have Bitdefender and Malwarebytes, I would start by completely uninstalling these programs and rebooting and checking things again.

It's a process of elimination.

Yes. I had disabled Bitdefender and Malwarebytes but found no change.
As you will know a forum member had suggested uninstalling Bitdefender and Malwarebytes but, before taking that drastic step, I had, as I reported, written to both companies.
B came back quickly with the suggestion that I run in Safe mode - which is why I looked for the way round Bitlocker and did that. I then wrote to Bitdefender asking if, as Safe mode showed speed restored, whether I should indeed uninstall.
The reply has been to suggest an adjustment in the B settings. However, the instructions to do that do not work and I am currently waiting further advice.
Still, that does look promising.
Malwarebytes have begun their investigation and asked me to run an investigation program which I have done.
Of course none of this is relevant to W10 Power Management which is what Zen said the problem was. Zen have not come back yet but I have kept them informed of relevant developments, the most interesting one being - I thought - that the uploads are significantly faster than the downloads.
That does seem to point to choking on the incoming rather than the outgoing and to the security programs.