Solved: `node` and `npm` Commands Not Recognized on Windows 10 After Node.js Installation

Have you ever installed Node.js on Windows 10, only to find the `node` command isn't recognized or the `npm` command is blocked by a PowerShell security policy? This article breaks down these two common pitfalls step-by-step. We provide clear, permanent solutions, from refreshing environment variables to adjusting PowerShell's Execution Policy, ensuring your development setup runs smoothly.