ios6 update and it promted restore lost all photos

My daughter got an ios6 update prompt. She hit ok, plugged it in to itunes, and it prompted a restore. She hit backup, but when she went to restore from backup, we can't find the photos. I tried to use 'my computer' on our Windows 7 PC, but it doesn't see the drive, so I am not sure how to use a recovery program to find the photos. Not sure of the generation. Can anyone help? Thanks!