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Latest Troubleshooting Guides

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Troubleshooting

Fix Windows Defender Error 0x80070422: Won't Turn On

If you see error code 0x80070422 when trying to turn on Windows Defender, it usually means the re...

Troubleshooting

Fix PostgreSQL Connection Refused Due to Firewall

When you see psql: error: connection to server at "host" (IP), port 5432 failed: Connection...


                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Git Clone Permission Denied (publickey) – Invalid Key
                                
When you run git clone and get Permission denied (publickey) with a mes...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix DNS Probe Finished NXDOMAIN on Android Chrome
                                
When you see DNS_PROBE_FINISHED_NXDOMAIN in Chrome on Android, it means the brow...
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix VirtualBox Kernel Driver Not Installed on Windows 10
                                
When you try to start a virtual machine in VirtualBox on Windows 10, you might see the error: 
                            
                        
                    
                    
                    
                        
                            
                            
                                Troubleshooting
                                Fix Windows Defender Update Failed Errors
                                
When Windows Defender fails to update its virus definitions, you may see error codes like 0x80240...



        
            
                
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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.