Help! Help!

Help! Help! My computer this time can not find the Sandisk M240, but before it was ok. What can I do?

Help! Help! My computer this time can not find the Sandisk M240, but before it was ok. What can I do? 

After I unplug the MP3 from computer and turned on it, it will show " Finalizing Update" very very long time. What is the problem?

Hi!

try taking out the battery for a couple of minutes… and then put a new on in.  Also try putting the hold switch on and connecting to pc, if ti shows try reformatting.