BitLocker Drive Encryption is simply a PIN number for your laptop – it will protect your laptop’s hard drive; so if it is lost or stolen, no one can view the contents of it.
Data on a lost or stolen computer is vulnerable to unauthorized access, either by running a software-attack tool against it or by transferring the computer's hard disk to a different computer. BitLocker helps mitigate unauthorized data access by enhancing file and system protections. BitLocker also helps render data inaccessible when BitLocker-protected computers are decommissioned or recycled.
BitLocker protects your laptop (ie if it is stolen), whereas multi-factor authentication protects your account online (eg from hackers).
To find out more visit Bitlocker on the Digital Hub.