When i try to sync my ipod 'itunes cannot sync apps to ipod because the apps installed on the ipod could not be determined and then it says 'ipod can not be synced becasue it can not be found'
I would suggest first trying these steps:
iPhone, iPad, iPod touch: Turning off and on (restarting) and resetting
If that does not resolve the issue, this article's troubleshooting might help:
iOS: Device not recognized in iTunes for Windows
Retrieving data ...