I've got a MFP (multi-function printer) from Dell that I use to scan directly to a shared folder on my computer. For this I use a seperate user that has share/write permissions on a shared folder. I don't want to show this user in the Windows 10 list, so here is how to hide it:
Start regedit and navigate here:
- Create a new sub-KEY under Winlogon named 'SpecialAccounts'
- Create a new sub-KEY under SpecialAccounts named 'UserList'
- In UserList, create a DWORD (32-bit) and give it the name of the user account. Leave the value at 0.
- Log out or Reboot
Update: Verified to work in Windows 10.