Windows10/11 Losing Mapped Drives (Error59 etc)

Disable Fast-boot through the Control Panel

  1. Press the Windows key on your keyboard, type in Power Options, and then press Enter .
  2. From the left menu, select Choose what the power buttons do.
  3. Under the Shutdown settings section, uncheck the box next to Turn on fast startup (recommended).
  4. Click the Save changes button.

Turn off the auto-disconnect feature

Windows will drop idle connections after a specified time-out period, I think it is 15 minutes by default, to prevent wasting resources. You can, however, easily re-establish the connection manually.

If you wish to turn off the auto-disconnect feature, type the following in an elevated command prompt and hit Enter.

net config server /autodisconnect:-1

Turn off auto-tuning network

If it occurs while copying large files over network drives, it could be due to the auto-tuning network.

To turn it off, open an elevated command prompt windows, type the following, and hit Enter:

netsh int tcp set global autotuninglevel=disabled

Go to Device Manager, network adapters and find the ethernet one.

– right click for properties – advanced 

Disable Energy efficient ethernet (and or green energy) and Wake on magic packet.