BitLocker Drive Encryption Service (BDESVC) Defaults in Windows 7

BDESVC hosts the BitLocker Drive Encryption service. BitLocker Drive Encryption provides secure startup for the operating system, as well as full volume encryption for OS, fixed or removable volumes. This service allows BitLocker to prompt users for various actions related to their volumes when mounted, and unlocks volumes automatically without user interaction. Additionally, it stores recovery information to Active Directory, if available, and, if necessary, ensures the most recent recovery certificates are used. Stopping or disabling the service would prevent users from leveraging this functionality.

Default Settings

Startup type:Manual
Display name:BitLocker Drive Encryption Service
Service name:BDESVC
Service type:share
Error control:normal
Object:localSystem
Path:%SystemRoot%\System32\svchost.exe -k netsvcs
File:%SystemRoot%\System32\bdesvc.dll
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BDESVC
Privileges:
  • SeChangeNotifyPrivilege
  • SeImpersonatePrivilege

Default Behavior

BitLocker Drive Encryption Service is a Win32 service. In Windows 7 it won't be started if the user doesn't start it. When the BitLocker Drive Encryption Service is started, it is running as localSystem in a shared process of svchost.exe. Other system components, such as drivers and services, may run in the same process. If BitLocker Drive Encryption Service fails to start, Windows 7 attempts to write the failure details into Event Log. Then Windows 7 startup should proceed and the user should be notified that the BDESVC service is not running because of the error.

Restore Default Startup Configuration for BitLocker Drive Encryption Service

1. Select your Windows 7 edition and service pack, and then click Download.

2. Save the Win7_BDESVC_Service_Startup.cmd file to a local storage device.

3. Run the saved file as an administrator.

4. Restart the computer.

The BDESVC service is using the bdesvc.dll file that is located in the %WinDir%\System32 folder. If the file is changed, damaged or deleted, you can restore its original version from Windows 7 installation media.