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

Fix Command Prompt Not Working After Windows Update

After a Windows update, you might click on Command Prompt and see nothing happen, or it flashes a...

Systemd Service Failed to Start: Journalctl Log Analysis Guide

You run systemctl start myservice and get a generic failure message. The service doe...

Remote Desktop Error 0x104: How to Fix Connection Issues

You try to connect to a remote PC via Remote Desktop (RDP) and get error code 0x104. The connecti...

Fix Microsoft Teams Access Denied on File Upload

You try to upload a file to a Teams channel or chat and get an 'Access Denied' error. The file se...

Fix Windows Security Authentication Error 0x80070035

Fix Windows Defender Token Expired After Update

After a Windows update, you might see an error that Windows Defender's security token has expired...