Fix 'Python Is Not Recognized as an Internal or External Command' - Fix DNS Probe Finished NXDOMAIN on Router: Step-by-Step-How to Fix Git Push Rejected: Non-Fast-Forward Merge

Prepare
Execute
Validate
Document
Operational follow-up
- Record the exact option, command, or setting that changed the result.
- Keep a rollback note if the workflow affects shared files or team settings.