How to Repair your Corrupted SD Card | eHow.com

http://www.ehow.com/how_4858964_repair-corrupted-sd-card.html

1. 
    
   www.sdcard.org

   You will need to go to the website
   http://www.sdcard.org/consumers/formatter/eula/
   Here you will download, install, and run the program to format your SD card. This is the most advanced step of the three, but most likely to work 99% of the time.

2. Step 5
   
    
   www.cgsecurity.org

   If you want to recover files ON your SD without erasing them, then you need to download and run the software on this site.
   http://www.cgsecurity.org/wiki/TestDisk_Download
   This is the best free software available for this type of problem.