Windows 10: Win 10 Disk active 100% ONLY when network connected

I am running Win10 on a desktop PC with all updates in place and Norton Security up and running. without any installs I have the often reported problem of a 100% active disk freezing the PC. The difference in my case is it happens ONLY when I plug in the ethernet cable OR a Wifi USB dongle OR the ethernet cable with a USB network adapter. After insert it takes 1-3 sec till disk usage goes up from 0-5% to 100% and the PC is more or less not usable any more.
When I disconnect the network it takes around 20 sec then disk usage goes down from 100 to 0-5 again. Network is OK as I am using wifi and ethernet with other (same WIN 10 same Norton setup) devices.

I tried each and (nearly) every solution I found on the net (full Norton scan, Google-Skype issue, search disabled, superfetch disabled, startup programs reduced, notifications disabled, fixed DNS, paging size corrected) but no improvement at all

I thought that maybe the network adapter could cause the problem, but using the USB wifi dongle or the USB ethernet connector should be a workaround, or?

Any ideas out there?
many thanks

:)

 

Disc active 100% on WIn 10 ONLY when network connected

sure, will test tomorrow morning asap. thx a lot!

 

Disc active 100% on WIn 10 ONLY when network connected

PS and of course I disabled all notifications

 

Try starting resource monitor and going to the disk section and sort by total. Then connect the wire and see what image names appear as heavy io. Give it some time and you may be able to find out what the problem is.

Fresh installs often have a lot of 'catchup work' to do before they settle down.