My Sansa e260

You need to manually re-install the firmware:

http://forums.sandisk.com/t5/User-guides-Firmware-Software/e200v1-01-02-24-Firmware-Download-amp-Instructions/m-p/41519/highlight/true#M655

Don’t click the link for the Sansa Updater. Instead click the link for the version of firmware appropriate to your geographical location and floow the manual installation directions.