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Troubleshooting

Cloudflare Error 521: Web Server Is Down Checklist

If you see Cloudflare error 521 (web server is down), it means Cloudflare cannot establish a TCP ...

Troubleshooting

Python Import Error: Module Not Found Despite Being Installed

You run your Python script and get ModuleNotFoundError for a package you’re sure you...

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Fix Windows Command Prompt Blank Cursor Not Showing

You open Command Prompt, type a command, but see no blinking cursor or only a blank rectangle. Th...

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Fix Apache Not Starting: Port 80 Already in Use

When Apache fails to start with the error (98)Address already in use: AH00072: make_sock: c...


                    
                    
                        
                            
                            
                                Troubleshooting
                                How to Fix Windows Security Not Opening
                                
You click the Windows Security icon in the taskbar or open it from Settings, but nothing happens—...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Reinstall Windows Terminal to Fix Module Not Found Error
                                
If you see a 'module not found' error when launching Windows Terminal, the app may have a corrupt...



        
            
                
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                    Support Note
                     Test fixes in a non-critical profile first, keep backups for configuration files, and record exact error messages before changing settings.