I am getting the same problem as in thread https://www-secure.symantec.com/connect/forums/pgp-1010-disc-encryption-does-not-complete-reports-100
Initially, I decrypted my entire drive. Then, after the decryption process completed successfully, I rebooted my sistem. Later, I started again encryption of my drive, only without specifying any kind of external token (only my Windows account and passphrase), and it just got stuck at 100%.
Another similar thread, linked here, suggested running pgpwde from the command line under Windows's Safe Mode. I did, and even though pgpwde reports "Request sent to Resume encrypt or decrypt was successful", it didn't work, encryption is still stuck at 100%. Stopping and then resuming encryption didn't work.
Running "pgpwde --status --disk 0" yields the following:
C:\Program Files (x86)\PGP Corporation\PGP Desktop>pgpwde --status --disk 0
Disk 0 is instrumented by bootguard.
Encryption process interrupted by user request
Current key is valid.
Whole disk encrypted
Total sectors: 625137538 highwatermark: 625137536 reserved start sectors: 2
Request sent to Disk status was successful
Running "pgpwde --list-users --disk 0" yields the following:
C:\Program Files (x86)\PGP Corporation\PGP Desktop>pgpwde --list-users --disk 0
Total of 1 user:
User 1: Name: Administrator Type: Symmetric A: S
System Record Information:
Disk UUID: cb4880de-d9b2-4de5-a102-51e7aab56156
Group UUID: cb4880de-d9b2-4de5-a102-51e7aab56156
Attribute Information:
S = SSO, O = Offloaded, L = Locked out, A = Anti Theft, M = Managed Admin
LSR = Local Self Recovery Available
Request sent to List users on disk was successful
Attached is a screenshot of the error: