When using Symantec Encryption Desktop (formerly PGP Desktop) on the computer with Windows 8 system, you are unable to upgrade the operating system to Windows 8.1 if your hard drive is encrypted. The issue may be observed when you are trying to update the system using installation media or Windows Store.
Windows Upgrade failed with error 0x80070020 or 0xc1900101 - 0x20017
Directly upgrading to Microsoft Windows 8.1 from the Windows Store.
Symantec Corporation is committed to product quality and satisfied customers. This issue is currently being considered by Symantec Corporation to be addressed in a forthcoming version or Maintenance Pack of the product. Please be sure to refer back to this document periodically as any changes to the status of the issue will be reflected here.
To work around this issue, perform the following instructions:
Microsoft Windows 8
Symantec Encryption Desktop 10.3.1