To enable the advanced CBT mechanism provided by the Veeam CBT driver, you need to install the driver in the Veeam Agent control panel. You can perform this operation at any time you need. To activate the driver after installation, Veeam Agent needs to reboot the computer. After computer reboot, the Veeam CBT driver will start keeping track of changed data blocks on computer volumes whose data you have selected for backup in the Veeam Agent backup job settings.