PGP Passphrases Hang Around Like Stray Cats

I installed PGP on my new laptop and after the reboot I got the PGP prompt for my passphrase.  This was a new laptop and was not yet encrypted so I was a little confused where it got a passphrase since I was using BitLocker on my old laptop.  Then logging into the PGP Universal Server I remembered I used PGP to encrypt a different laptop while we were testing.  PGP carried over the old passphrase, and of course since it was installed on a test laptop I didn’t remember (or record) the passphrase I used.  I removed my user and computer entries in PGP and was able to install and encrypt after wiping the partition table and reinstalling from the factory default image.