Knowledge base for software setup, errors, and daily tool work.

Fix Putty Connection Refused on Port 22

You try to connect to a remote server with Putty on port 22, but you get 'Connection refused'. Th...

How to Fix 'Teams Permission Denied for File Upload'

You try to upload a file to a Teams channel or chat, but see a 'permission denied' error. This us...

Fix Chrome DNS Error Using chrome://net-internals

If you see a DNS error in Chrome—like "ERR_NAME_NOT_RESOLVED" or "DNS_PROBE_FINISHED_NXDOMAIN"—th...

Command Prompt High CPU Usage: Sysadmin Checklist

When Command Prompt (cmd.exe) consumes excessive CPU, it often indicates a runaway batch script, ...

Fix Windows Security Service Stopped Working in Windows 10

If you see a notification that the Windows Security service has stopped working, your antivirus o...

Fix KMS Activation Error: Port 1688 Already in Use