Does WinPE contain a certificate store? We have a KMDF driver that needs to be included as a PnP driver in a custom WinPE image. The image fails to boot cleanly, and we believe the reason is because the WdfCoInstaller complains about the signatures on the Wdf.cab file, which is self-extracted from the co-installer. What's going on here? ---------- WdfCoInstaller: [04/05/2007 16:57.01.890] ReadComponents: WdfSection for Driver Service Xxxxxx using KMDF lib version Major 0x1, minor 0x5 WdfCoInstaller: [04/05/2007 16:57.01.953] Error: status(800B0001) Unknown trust provider. when verifying trust for X:\minint\Temp\WdfTemp\WDF.cab WdfCoInstaller: [04/05/2007 16:57.01.953] Digital Signatures on file X:\minint\Temp\WdfTemp\WDF.cab are not trusted: Error status(800B0001) Unknown trust provider.