Serial number i lost my serial number of my Ds_40 how can i get it back

probably behind the battery.

Try looking under the battery door? Olympus has a free downloads on their site

I would recommend contacting the dealer whom you purchased the DS40 from. Many times, they keep track of the License ID numbers for cases like this.

You go to the Menu files. Then go to the bottom menu showing a wrench. Then go to the bottom of the file, you need to go below the visible menus using the right arrow to get to System Info. Scroll down to get the serial number. 

open the battery compartment there is a very small white sticker that has your serial number hard to read but it is there enjoy!

Try logging into Olympus support. The site is a little difficult to navigate but go in through the professional digital dictaphones and then into archived (or older) models until you find the DS 330. Follow the links to software downloads and you should be able to download the DSS suite and all updates. The DSS suite automatically recognizes most Olympus DSS models. If you will "save" the downloads first, you can burn them to a disk so that you will have a back up copy

I just bought a used DM-40, and formatted my device before reading that I lost the voice guide files. I tried the above links and s/n for installing DSSplayer 7 but no joy. Does anyone have the files who would be willing to email them to me, and tell me which folder to place them in? Or provide a working s/n for a v7 installation? Thanks, Mike

I don't think the serial number is required to install the software. I didn't see DS-30 information on the Olympus website. DS-40 was the closest one. No information was availbable regarding serial numbers.

I have a VN-4100PC and don't recall being asked for a serial number. The software is the same thing for all Olympus players.

Mark, you have a purchase a new version of the software unless you can somehow find that serial number. Your local Olympus dealer can make a copy of the software for you but you would require the Serial number.

Turn in the theft to the police. They check serial numbers from pawn shops. Go luck thought, they really don't care.