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Service FBWF-Protected Devices (Standard 7 SP1)

  • Article

7/8/2014

Servicing the image on an FBWF-protected device requires special care, depending on the files being updated.

Warning

When a write filter (EWF or FBWF) is enabled, Offline servicing (booting up into WinPE and using Deployment Image Servicing and Management (DISM) to update the system) must not be used. Performing such servicing may result in unpredictable behavior that varies from problems booting up the system to updates not being applied.

To modify files that are being used, to modify the registry, or in update scenarios that require restarts

  1. Disable FBWF.

  2. Restart.

  3. Service the image. If installing an update, wait for the install to complete and restart the computer (if required).

  4. Enable FBWF.

  5. Restart.

To enable and disable FBWF, use either the FBWF APIs FbwfEnableFilter and FbwfDisableFilter or the following FBWF Manager commands:

fbwfmgr /enable
fbwfmgr /disable

For servicing scenarios where affected files are not in use, and where registry modifications are not required, use FBWF to commit the changes after they are applied. For example, use FBWF to commit updates to the signatures used for virus detection.

Commit file changes by using either the FBWF API FbwfCommitFile or the following FBWF Manager command:

fbwfmgr /commit [volumename] [path]

See Also

Reference

FbwfEnableFilter
FbwfDisableFilter

Concepts

FBWF Manager