
How to Fix Windows Defender Firewall Blocked App
You try to open an app, but it either won't start or can't connect to the internet. A common caus...
Software troubleshooting desk

You try to open an app, but it either won't start or can't connect to the internet. A common caus...

You see "Authentication failed" when trying to activate Windows. This usually happens after a har...

After a Microsoft Teams update, you might see a "connection refused" error when trying to sign in...

You launch Microsoft Teams and get an error like "Port already allocated" or "Port 8...

If your PC feels sluggish and Task Manager shows Windows Security (or Antimalware Service Executa...

If Chrome's CPU usage spikes when you watch YouTube, the browser may stutter, fans spin up, or ba...