Checklists for software errors, setup, and tool workflows.

Fix 'package.json Not Found' After Cloning a Repository

Symptom

You clone a repository from GitHub (or another remote), change into the directory...

Fix npm install Permission Denied in VS Code Terminal

When you run npm install in the VS Code terminal and get a permission denied error, ...

Fix Python Venv Not Activating in PowerShell

You open PowerShell, navigate to your project, and run venv\Scripts\activate but not...

Fix Windows Update Error 0x800f081f with Media Creation Tool

If you see error 0x800f081f when running Windows Update, it usually means a system file or compon...

Fix VS Code Permission Denied When Not Admin

You try to save a file or install an extension in VS Code, and get a "permission denied" ...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...