Checklists for software errors, setup, and tool workflows.

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Fix Git 'index.lock file exists' Error

When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

Fix 'Python' Command Not Found After Reinstall on Windows
You reinstalled Python on Windows, but when you type python in Command Prompt, you g...

Fix VSCode Git Authentication Failed: Permission Denied
If you see 'Git authentication failed' or 'permission denied' when pushing or pul...

Fix Windows 11 Installation Assistant Stuck at 99% in Safe Mode
If you're running the Windows 11 Installation Assistant in Safe Mode and it gets stuck at 99%...

Fix DNS Probe Finished NXDOMAIN in Edge Browser
When Microsoft Edge shows "DNS_PROBE_FINISHED_NXDOMAIN", it means the browser cannot reso...

Fix VSCode Permission Denied on Save in Linux
You're editing a file in Visual Studio Code, press Ctrl+S, and see a red error: "Failed t...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git 'index.lock file exists' Error

Fix 'Python' Command Not Found After Reinstall on Windows

Fix VSCode Git Authentication Failed: Permission Denied

Fix Windows 11 Installation Assistant Stuck at 99% in Safe Mode

Fix DNS Probe Finished NXDOMAIN in Edge Browser

Fix VSCode Permission Denied on Save in Linux

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