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Encryption Blog

Installing Whole Disk Encryption on a Previously Encrypted Drive

Created: 25 Mar 2009 • Updated: 05 Nov 2012
Doug McLean's picture
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Q: After using various encryption solutions, we have chosen PGP as the best solution, but I have a couple of machines causing problems. These machines previously had  another vendor's full disk encryption product installed on them, but they have been decrypted and the software uninstalled. PGP installs fine on the machines, but when Whole Disk Encryption is chosen, they come up with the following error :

'Another whole disk encryption product is installed. Please remove it before trying to encrypt your drive.'

I know that the recommended solution would be to re-image them, but this is going to cause problems with legacy software installed on a few of them. Is there another way round this ?

A: The most common cause of this issue is that the previously installed product was not completely uninstalled. Specifically, unless the system registry entries are cleaned up, PGP Whole Disk Encryption will believe that the older product is still installed. If you know the product has been removed and you know how to manually delete the registry entries, WDE should work just fine.