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 listFix Microsoft Teams File Locked After Upload
You upload a file to a Teams channel chat or a Files tab, then see a message that the file is loc...
Fix Windows Activation Authentication Failed via Command Prompt
If you see 'Windows activation authentication failed' when trying to activate Windows, the issue ...
How to Fix Windows Defender Error 0x800704ec
When you see error 0x800704ec in Windows Defender (now called Microsoft Defender Antivirus), it u...
Fix Outlook SMTP 587 Port Already Allocated Error
You try to set up or send email in Outlook, and you see an error about port 587 already being all...
Fix Windows 10 Activation Access Denied Permission Issue
You try to activate Windows 10 but see 'Access Denied' or 'Permission Denied.' This usually means...
Topic paths
Quick titles
Command Prompt System Repair Guide for WindowsFix Microsoft Teams Token Expired Sign-In LoopFix ERESOLVE Unable to Resolve Dependency Tree ErrorFFmpeg Audio Out of Sync? Here's How to Fix ItFixing Chrome's Invalid Configuration Error on LaunchResolve Outlook Startup Failure Due to Add-InsResolve Chrome Profile Not Found 404 on Windows 11Windows Update Service Won't Start After Update