This policy setting allows you to specify which boot-start drivers are initialized based on a classification determined by an Early Launch Antimalware boot-start driver. The Early Launch Antimalware boot-start driver can return the following classifications for each boot-start driver: Good: The driver has been signed and has not been tampered with. Bad: The driver has been identified as malware. It is recommended that you do not allow known bad drivers to be initialized. Bad, but required for boot: The driver has been identified as malware, but the computer cannot successfully boot without loading this driver. Unknown: This driver has not been attested to by your malware detection application and has not been classified by the Early Launch Antimalware boot-start driver. If you enable this policy setting you will be able to choose which boot-start drivers to initialize the next time the computer is started. If your malware detection application does not include an Early Launch Antimalware boot-start driver or if your Early Launch Antimalware boot-start driver has been disabled, this setting has no effect and all boot-start drivers are initialized. The recommended state for this setting is: Enabled: Good, unknown and bad but critical. Rationale: This policy setting helps reduce the impact of malware that has already infected your system. Impact: None - this is the default behavior.
To establish the recommended configuration via GP, set the following UI path to Enabled: Good, unknown and bad but critical: Computer Configuration\Policies\Administrative Templates\System\Early Launch Antimalware\Boot-Start Driver Initialization Policy Note: This Group Policy path may not exist by default. It is provided by the Group Policy template EarlyLaunchAM.admx/adml that is included with the Microsoft Windows 8.0 & Server 2012 (non-R2) Administrative Templates (or newer). Default Value: Disabled. (Boot-start drivers determined to be Good, Unknown or Bad but Boot Critical are initialized and the initialization of drivers determined to be bad is skipped.)