We have a bunch of laptops that are using PGP WDE 9.6. The last batch of laptops we purchased were Dell Latitude E6410s and when we load WDE on these, in about 85% of cases it works fine, in 10% of cases, after entering the password into PGP BootGuard it periodically does not boot but works fine after rebooting and trying again, and in about 5% of cases it refuses to proceed past BootGuard no matter what we do (normal boot, recovery CD, etc). The only way I have found to boot a system when it gets to this point is to use the recovery CD to decrypt the hard drive.
The problem with this approach is it takes all day, and the employee is meanwhile without a computer. I've had this problem with 2 out of 30 systems, and both times it worked fine long enough to get deployed to the user, but then stopped booting completely a few days later.
I no longer have support from PGP, and they've told me that if I want to renew my support I would need to purchase all new licenses ($20k+), which is not an option. I looked through the support forums, but most of the threads there don't end up with any sort of resolution.