How to Check Which Process Is Using a Port in PowerShell
When a service fails to start or an application complains that a port is already in use, you need...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFixing Outlook Rate Limit Errors on Shared Mailboxes
If you manage a shared mailbox in Outlook and suddenly see an error about being rate limited, you...
How to Fix Windows Defender Access Denied Error
If you see an "Access Denied" error when trying to open Windows Defender or run a scan, it usuall...
Fix 'Outlook File Locked by Windows File Sharing' Error
You try to open Outlook and get an error that the PST or OST file is locked by Windows file shari...
Fix Windows Security Not Starting Due to Third-Party Antivirus
If Windows Security (formerly Windows Defender) refuses to start or shows a blank screen, a third...
Fix OneDrive Sync Issues After Windows Update
After a Windows update, OneDrive may stop syncing, show errors, or refuse to start. This happens ...
Topic paths
Quick titles
Resolve Connection Refused Due to Permissions in CMDWindows Security 502 Bad Gateway: Troubleshooting ChecklistHow to Transfer a Windows License to a New ComputerRemote Desktop Clipboard Troubleshooting GuideChrome Profile Update Error Fix GuideUbuntu Installation Security Checklist for Windows UsersTask Scheduler High CPU Usage TroubleshootingWindows 10 Activation Fix Checklist