When using the reagentc.exe tool to enable WinRE on a system which has previously had WinRE enabled, it fails with 0xc0000005 ACCESS_DENIED error. Normally, when you encounter this error you may run reagentc /disable to uninstall WinRE, however disable will also fail in some scenarios where the BCD store has been replaced or destroyed, or does not contain the original WinRE entries.
For example, this can occur in multi-disk configurations, or if the BCD store has been repaired. If reagentc.exe /disable succeeds, a subsequent enable command should also succeed.
For example, this can occur in multi-disk configurations, or if the BCD store has been repaired. If reagentc.exe /disable succeeds, a subsequent enable command should also succeed.