1-866-726-3475 Sandisk Customer Support
click on support at the top; click on MP3 players,
find your Sansa and click on it there’s a lot of info
You might want to restore to factory settings. Only problem, you will loose all the music etc in your Sansa, but it should work. First back up the media on your Sansa to your hard drive, flash drive or SD card so you can reload it more easily.