If you receive this error while trying to update the firmware on your Olympus DM4 digital voice recorder, disconnect the recorder and run a Disk Defragmenter on the computer in question. If you’re working on a Windows 7 machine, stop and try it on another machine.  I would recommend trying this firmware update on a PC running Windows XP.

Olympus is aware of the issue and currently working on a resolution.  As of right now (9.6.11) this problem is primarily affecting Windows 7 64bit users.  If you have Windows 7 32bit, it’s recommended that you format the recorder then try running the update again.

Verification Source: In-house testing
Testing Date: 9.6.11