Check Which Process Is Using a Port on Windows
When a service or application fails to start because a port is already in use, you need to identi...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Activation Token Expired Despite Internet Connection
You see a message that your Windows activation token has expired, even though you're connected to...
How to Fix Outlook Error 0x80040610 on Windows
Outlook error 0x80040610 usually appears when you try to send or receive email. The message says ...
How to Clear Chrome SSL State to Fix Certificate Errors
If you're seeing warnings like NET::ERR_CERT_COMMON_NAME_INVALID or Your connection ...
How to Fix WinRAR Checksum Error and Configuration Settings
If you see a 'Checksum error' or 'CRC failed' message in WinRAR, the archive is likely damaged or...
Fix Port Already Allocated Error in Windows Security
If you see a 'port already allocated' error when starting a Windows Security-related service or a...
Topic paths
Quick titles
Fix Windows Terminal Authentication Failed in Active DirectoryFix 'Security Module Not Found' in Windows DefenderChrome Update Error 12: Causes and SolutionsHow to Fix Chrome Browser Path Not Found in RegistryTroubleshooting Windows Defender Service Dependency ErrorsChrome Extension Permissions: How to Grant and ManageHow to Fix Windows Update Invalid Configuration ErrorTroubleshooting Postman Connection Errors