On attempting to start your virtual machine based on a Boot Camp partition residing on a PGP encrypted drive, you get a bootguard screen.
Your Mac hard drive, including the Mac HD partition and the Boot Camp partition, is encrypted using Symantec's PGP Whole Disk Encryption software.
In the case of Boot Camp partition, the PGP boot loader has replaced the Windows boot loader in the Master Boot Record (MBR). When launching the Boot Camp partition via Parallels Desktop, it accesses the partition data through Mac OS X, which already has access to the decrypted data. Since it has the PGP boot loader, it assumes the disk is still encrypted, and fails when it tries to decrypt it again.
- Start Parallels Desktop but do not launch your virtual machine.
Right click on your virtual machine in the Control Center and choose Configure -> Hardware -> Boot order. Make "CD/DVD" the first in the "Boot order" list.
Go to Hardware -> CD/DVD and make sure the Windows installation .iso image file or a DVD disk is connected to your virtual machine.
Start your Boot Camp based virtual machine and choose to boot it from an optical drive when prompted.
At the Welcome screen, select the Language and Country and click Next.
Click on Repair your Computer.
Choose Command Prompt.
Press Return, then restart your virtual machine.