BitLocker is typically set to operate in “transparent” mode, automatically unlocking when you start your computer. This uses the computer's Trusted Platform Module (TPM) hardware to unlock the drive. The TPM stores the encryption key and provides it only if the Windows operating system does not appear to have been tampered with.
This technology is a critical way for businesses to protect their company data. That's why companies often require the use of BitLocker on their managed PCs. But it's also a useful way for individuals to protect their personal data. If someone gains access to your laptop, they won't be able to access your files without the key. Even if you turn on your laptop, you'll still need to log in to your Windows user account to access your files.
If you ever have a problem with BitLocker, you'll be asked to provide a BitLocker recovery key. If you set up BitLocker yourself, Windows told you to keep it somewhere safe. If you set it up through your workplace, they have a copy. In some situations, a copy will also be saved with your Microsoft account.
