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

Fix OneDrive Sync DNS Errors After Network Change

After changing networks—switching from home to office Wi-Fi, using a VPN, or reconfiguring your r...

Fix Windows Security Service Not Running Error

You open Windows Security and see a red banner: “Windows Security service is not running.” Or you...

Fix Microsoft Teams File Locked by Previous Session Error

You try to edit a file in Microsoft Teams and see a message that the file is locked by a previous...

Windows Store Error 0x80073cf9: How to Fix Installation Failures

You try to install or update an app from the Microsoft Store, but you get error 0x80073cf9. The a...

Fix Windows Defender Module Not Found Error 0x80070643