Git Push Rejected Non Fast Forward: Troubleshooting Checklist
If you see ! [rejected] main -> main (non-fast-forward) when running
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesChrome Black Screen on Windows? Fix Hardware Acceleration in 2024
If Chrome shows a black screen, especially after an update or while watching video, hardware acce...
Fix Python Venv Not Activating in PowerShell
You open PowerShell, navigate to your project, and run venv\Scripts\activate but not...
Fix Windows 11 Installation Assistant Stuck at 99%
You're upgrading to Windows 11 using the Installation Assistant, and it gets stuck at 99% for...
Fix Chrome Status Access Violation: Clean Install Guide
If you see 'Status access violation' in Chrome, it usually means a corrupted user profile...
Fix Windows Update Service Not Running in Event Viewer
You open Event Viewer to check for errors after a failed Windows Update, and you see an event sta...
Issue queue
SitemapAvoid Memory Errors Reading Large Files in Python
Troubleshooting Firefox SSL Error Codes
Overcoming 'remote origin already exists' in Git
Fix 'package.json Not Found' After Cloning a Repository
Fix pip Error: Externally Managed Environment
Troubleshoot VS Code Git Not Seeing Subfolder Edits
Guide to Docker Disk Usage and Pruning
Docker Build Canceled: Verbose Logging Fix
Chrome Sync Broken on Android – Step-by-Step Repair
Fix ERR_CERT_AUTHORITY_INVALID on Localhost
Fix Pip Install Permission Denied Error
Nginx Syntax Error: Common Causes and Solutions
Troubleshooting Firefox SSL Error Codes
Overcoming 'remote origin already exists' in Git
Fix 'package.json Not Found' After Cloning a Repository
Fix pip Error: Externally Managed Environment
Troubleshoot VS Code Git Not Seeing Subfolder Edits
Guide to Docker Disk Usage and Pruning
Docker Build Canceled: Verbose Logging Fix
Chrome Sync Broken on Android – Step-by-Step Repair
Fix ERR_CERT_AUTHORITY_INVALID on Localhost
Fix Pip Install Permission Denied Error
Nginx Syntax Error: Common Causes and Solutions