Always download Ledger Live from the official Ledger website. Never install it from third-party sites or links in emails.
Download the installer, open it, and follow the prompts. On macOS you may need to confirm the app in System Settings under Security.
Download the Linux package or use the official AppImage. Make it executable and run it, or install through your package manager if available.
Install Ledger Live from the App Store or Google Play. Verify the developer name before installing.
Open the app and choose whether to set up a new device or restore an existing one, then follow the guided steps.
A clean install from the official source takes only a few minutes and is the foundation of everything else.