Checklists for software errors, setup, and tool workflows.

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Fix Windows Security Token Expired Error 0x80070520

You see error 0x80070520 with the message 'The security token has expired.' This usually happens ...

Fix Microsoft Store Token Expired Not Syncing Error

You open Microsoft Store and see a message that your token has expired, or apps won’t sync purcha...

Fix VS Code Terminal Not Opening After Update

After a VS Code update, you might click the terminal panel and nothing appears—just a blank area ...

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 'Connection Refused' Error on localhost in CMD

When you run a command like curl http://localhost:8080 or telnet localhost 330...

Fix Port Already Allocated Error for Windows Update on Windows 10
You try to run Windows Update but get an error message like 'port already allocated'. This usuall...