I recently asked the same question of AOMEI support. Here is the reply of 'Admin'.
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admin
January 25
@Daddybear, @Kes, "volnap" is the driver of VSS service, while the "ambakdrv" is the driver of AOMEI Backupper.
Sorry that AOMEI Backupper 6.3 accidentally delete the "volnap" when installing it. But, when you re-add the "volnap", AOMEI Backupper will not delete it again when you using AOMEI Backupper.
We have fixed the problem in the next version. We will release the new version asap.
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I wonder if anyone has also flagged the registry corruption issue with Kaspersky, and what their response has been.
