Hi PGP_Ben,
Sorry for the late reply. I've tried Safe Mode, along with Last Known good, and Safe Mode with Networking without success.
I've also tried dycrypting the HDD externally on another working maching with PGP, then ran chkdsk /f while the drive was attached to the other machine. Put the drive back in the original system, and was still stuck. I had not tried sfc /scannow as I couldn't get into the OS on the drive.
Your link is interesting and I will have to try the workaround provided the next time I encounter this to see if it can resolve the issue. I'd love to go to 10.3 but might be a while as it usually takes a while to roll out an update in my organization.