Fix 'Port Already in Use' Error with No Visible Process
When you try to start a server or service on a specific port, you might see an error like "port a...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listTask Scheduler Troubleshooting Checklist
When a scheduled task fails to run, runs at the wrong time, or throws an error, the cause is ofte...
How to Fix Microsoft Teams Service Unavailable on Windows 10
Users running Microsoft Teams on Windows 10 sometimes see the error 'Service Unavailable' when tr...
How to Fix MySQL Connection Refused and Permission Denied Errors
When you see ERROR 2003 (HY000): Can't connect to MySQL server on 'host' (111 Connection re...
Fix Outlook Module Not Found Error 0x80040154
You open Outlook and get an error: 0x80040154 — "Class not registered" or "module no...
Fix Windows Search Version Mismatch Configuration Tool
If you see an error like "Windows Search version mismatch" when trying to run the configuration t...
Topic paths
Quick titles
Teams Not Opening: Step-by-Step TroubleshootingHow to Resolve BitLocker Certificate ErrorsFix Windows Update Token Expired Error with Clean BootResolve Teams Port Allocation Error with Registry EditOneDrive Sync Stuck: Troubleshooting GuideRefresh Microsoft Store Token GuideWindows Update Proxy Configuration GuideTroubleshooting Error 0x8007052e in Task Scheduler