Thanks for providing detailed info, including the build and recent update. When the Run dialog doesn’t appear via Start > Run or WIN+R, it’s often due to system shell issues, group policy/settings, or update-related bugs. Here are some steps to help diagnose and resolve:
1. Check for Stuck Explorer Process
- Open Task Manager (Ctrl+Shift+Esc); if you can, try restarting Windows Explorer (right-click “Windows Explorer” > Restart).
2. Try Using Another User Account
- Does the Run dialog work in another Windows user account? This can help determine if the issue is system-wide or profile-specific.
3. Scan for Corruption
Open Command Prompt as admin and run:
sfc /scannow
After SFC completes, also run:
dism /online...