How to Fix Command Prompt Not Opening in Windows 10 - Windows Update Error 0x800f0986 – Step-by-Step Fix-Command Prompt Auto Start Configuration Checklist
Before changing system settings, save your work and note the exact error text so you can compare results after each step.
Extra verification checklist
- Restart the affected app after changing permissions or configuration files.
- Test the same workflow in a clean browser profile or a temporary user account.
- Compare the result on another network if the error may be connection related.