Hi IWhite,
As per the comment by Mike on your other forum below
https://www-secure.symantec.com/connect/forums/pgp-imac-no-disc-listed-encrypt
Symantec Drive Encryption no longer supports Bootcamp after Apple made changes to it in Mavericks. Fusion drives are also not supported.
Your drive may also have been converted to Core Storage during an OS upgrade, which is also not a supported configuration for Encryption Desktop.
Please check the article below for you reference on HOW TO: Disable CoreStorage on Mac OS X 10.10 (Yosemite)
https://support.symantec.com/en_US/article.HOWTO109622.html