Hi, AlexChato9's workaround works fine on Windows 10 too. I've downloaded the XP driver R171789.exe and executed in compatibility mode the way you suggested
Win 10 tried to install it using the default settings (XP), and currently anything is working fine.
No need to reboot the system.
Thanks a lot to you and to Medienfox
THANKS! This outdated thread help my still alive D820 running windows 8.1 - although I seldom use it.
I have an E6510 running linux, I've been off windows for years. Admittingly as far as windows goes, the old D820 doesn't have any real problems keep up with 8.1