Add "Run in Separate Memory Space" check box to Run dialog box: registry value MemCheckBoxInRunDlgUserHKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Policy ID
MemCheckBoxInRunDlg
Scope
User Configuration
Supported on
At least Windows 2000
Source
Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category
Start Menu and Taskbar

Registry

MemCheckBoxInRunDlg

-User