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Latest Troubleshooting Guides

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Troubleshooting

How to Fix Windows Defender DNS Error

You open Windows Security and see a message like "DNS server is not responding" or "Your IT admin...

Troubleshooting

Fix 'Command Prompt Not Found' Error After Windows Update

After a Windows update, you might see a '404 not found' error when trying to open Command Prompt,...

Troubleshooting

PowerShell Command Not Found but Works in CMD

You open PowerShell, type a command you know works in Command Prompt, and get an error like

Troubleshooting

Fix PuTTY Connection Refused: Check SSH Service

When you see 'Connection refused' in PuTTY, it usually means the SSH server on the remote machine...

Troubleshooting

How to Fix npm install EACCES Error on macOS and Linux

When running npm install, you may see an error like EACCES: permission denied<...


                    
                    
                        
                            
                            
                                Troubleshooting
                                Fixing WinRAR Checksum Errors When Extracting RAR Archives
                                
You're extracting a RAR archive and WinRAR stops with a "checksum error" message. This usually me...



        
            
                
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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.