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"SGM401: Invalid kernel error" After Uninstalling 5.50.16

Hello,

I'm currently testing a possible deployment of Sophos SafeGaurd Disk Encryption. The test includes, installing using Sophos and then uninstalling.

Currently after uninstalling the disk decrypts OK but after the uninstall requests a reboot I get a "SGM401 Invalid Kernel Error". 

The problem is that the uninstall doesn't restore the plain MBR even after unencrypting the disk and removing the application.

If I boot via WinPE and fix the MBR everything is fine. 

Why does this behaviour happen? Shouldn't the uninstall restore the original MBR?

:38455


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