Hide drives in File Explorer using Registry or Group Policy Object (GPO)

For IT Admins - How to hide C and D drives in Windows File Explorer using GPO or registry value "NoDrives" and what to do if "Hide these specified drives in My Computer" isn't working

Hide these specified drives in My Computer using GPO

Restrict A, B, C and D drives only 

"Hide these specified drives in My Computer" not working?

I had to configure this recently on Citrix Virtual Desktop and when testing the Group policy setting "Hide these specified drives in My Computer", it just didn't work

User Configuration - Administrative Templates
Windows Components - File Explorer
Hide these specified drives in My Computer
Enabled
Restrict A, B, C and D drives only

I managed to hide drives using the HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer registry key instead

Hide drives in File Explorer using registry "NoDrives"

You can use this registry key and the "NoDrives" value to hide drives in File Explorer

HKLM
SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer
Value: NoDrives

Registry "NoDrives" values

Example: GPO with registry setting to hide drives

Registry setting to Hide A, B, C and D drives

GPO to create registry entry to hide drives

Computer Configuration - Preferences - Windows Settings - Registry

HKLM
SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer
NoDrives
DWORD
Value 15
Base Decimal