Encryption helps protect the data on your device so it can only be accessed by people who have authorization. If device encryption isn't available on your device, you might be able to turn on standard BitLocker encryption instead. Note that BitLocker isn't available on Windows 10 Home edition.
Select the Start button, then select Settings > Update & Security > Device encryption. If Device encryption doesn't appear, it isn't available. You may be able to use standard BitLocker encryption instead.
If device encryption is turned off, select Turn on.
In the search box on the taskbar, type Manage BitLocker and then select it from the list of results. Or you can select the Start button, and then under Windows System, select Control Panel. In Control Panel, select System and Security, and then under BitLocker Drive Encryption, select Manage BitLocker. Note: You'll only see this option if BitLocker is available for your device. It isn't available on Windows 10 Home edition.
Select Turn on BitLocker and then follow the instructions.