Node.js 20 LTS is fully supported on Windows 10 (x64). Node.js 20 requires Windows 10 or later — Windows 7/8 are not supported. Download the .msi installer from nodejs.org. For native modules, install Visual Studio Build Tools. The .msi installer configures PATH automatically.
Workarounds & Fixes
For node-gyp errors: `npm install -g windows-build-tools` (PowerShell as Admin)
For PATH issues: reinstall via .msi with "Add to PATH" selected