How to uninstall disk encryption?

I tried to uninstall disk encryption but it keep asking me to decrypt or remove encrypted volumes before uninstalling.
But I check and there are no encrypted volumes. Please help.

Evening,

I Too Have This Issue, Only Way To Remove It I Would Have To Say Is Double Check That you can get into all your local drives with out Disk Encryption Running,
Then Download Revo Uninstaller ( http://www.revouninstaller.com/ ) Then Boot In Safe Mode Then Uninstall CDE With The Advance Option Enabled (Make Sure CDE Is Disabled In Services, and Not Running) Then Continue Uninstalling,

This Issue Has Not Been Resolved To My Knowledge

CG