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

Fix 'Permission Denied' in Ubuntu Terminal

You type a command in the Ubuntu terminal and get Permission denied. This usually me...

Fix Windows Security Authentication Error 0x80070035

Fix Windows Activation Sync Issue Between Windows and Ubuntu

If you dual-boot Windows and Ubuntu and suddenly see a “Windows isn’t activated” message, the iss...

Windows Defender Troubleshooting Guide for IT Admins

Windows Defender (Microsoft Defender Antivirus) is the default endpoint protection in Windows 10 ...

Fix OneDrive Connection Refused Due to Firewall Settings

You open OneDrive and see "Connection refused" or "Cannot connect" errors. Often this is because ...

Microsoft Teams 404 Error: Causes and Fixes

When you see a 404 error in Microsoft Teams, it usually means the app can't find a specific resou...