Checklists for software errors, setup, and tool workflows.

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Fix Windows Defender Service Not Starting (Error 0x80070422)

You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...

Fix Command Prompt Not Working in Windows 10

You click the Command Prompt shortcut or type cmd in the Run dialog, but nothing hap...

Fix OneDrive Sync Connection Refused on Windows 11

If you see "connection refused" when OneDrive tries to sync on Windows 11, the app can't reach Mi...

How to Fix Windows Defender High CPU Usage by Disabling Real-Time Protection

If Windows Defender is causing high CPU usage, it can slow down your computer. The most direct fi...

Fix Windows Activation Command Error 0x80070002

When you try to activate Windows using the command line—for example, running slmgr /ato

OneDrive Sync Not Working: Files Not Syncing to Cloud Fixes
You see the OneDrive icon with a paused or error symbol, and your files aren't reaching the cloud...