TRUSTING YOUR COMPUTER
Ledger hardware devices provide the easiest and most secure way to keep your bitcoins safe. However, when you use your Ledger Wallet for the first time to create your Bitcoin wallet, you have to trust the computer you’re currently using (whether at home or in a public place). Sensitive personal information (like your wallet backup or recovery phrase) may be readable by the host computer at this moment (before it's written securely on the Ledger Wallet) so you need to make sure it will not be compromised or stolen by the host computer while typing or writing it (keyloggers, malwares and viruses).
SECURED DEVICES INITIALIZATION
Ledger Starter features a lightweight, Linux-based operating system on a USB form factor that allows you to manage your Ledger device (Nano or HW.1) in a very secure and safe environment. Simply boot your preferred PC or Mac (desktop models only) using it, and it will automatically perform the initialization or recovery procedures within an offline, isolated context. Ledger Starter makes it safe to initialize your Ledger Wallet on any computer, regardless of the level of security of the operating system it usually runs.