No Disk in Drive Error

[Guest]

Acrobat XI with 11.0.01 patch applied

Windows 7 x64

Deployed to about 1100 machines via MS SCCM.

When opening PDFs a lot of users are receiving error messages about not having a disk in drives A:\ and D:\ even though they opened the PDF from their C:\ drive. After clicking OK the PDF does eventually open.

We noticed that if we turn off Protected Mode these errors go away but for a number of reasons we will not be turning off protected mode.

Please advise.

Thanks.

[Guest]

This ended up being a device control policy in Symantec Endpoint Protection 12. My guess is if we were up to date with the latest relesse of SEP server this wouldn't have been an issue but thankfully we no longer needed the device policy. Thought I would follow up.