BitLocker is often configured to function in “transparent” mode, automatically unlocking itself when you boot your computer. This uses the TPM (Trusted Platform Module) hardware in your computer to unlock the drive. The TPM stores the encryption key and provides it only if the Windows operating system doesn’t appear to have been tampered with.
This technology is a critical way for businesses to secure their company’s data. That’s why businesses will often enforce BitLocker usage on their managed PCs. But it’s also a useful way for individuals to secure their personal data. If someone does get their hands on your laptop, they won’t be able to access the files without the key. Even if they boot the laptop up, they’ll need to sign into your Windows user account to access your files.
If you ever have an issue with BitLocker, you will be asked to provide a BitLocker recovery key. If you set up BitLocker yourself, Windows prompted you to store it somewhere safe. If you set it up through your workplace, they have a copy. A copy will be stored with your Microsoft account in some situations, too.