Symantec Information Centric Encryption (ICE)
Install the ICE agent and associate it with a browser.
Confirm it works and does decrypt the files.
Change the default browser.
When you receive an encrypted file and try to open it, you are prompted to install ICE.
If you attempt to install ICE it recognizes that ICE is installed and prompts you to remove ICE.
Development has determined that this issue is caused by changes Microsoft made to Windows 10.
Development is working on a fix to be included in a later release.