Ipod Touch not being recognized by iTunes

Hello,

I own an iPod Touch 3G (updated to OS 4), and ever since I upgraded my iTunes to 9.2 (from 9.1) it would not detect my iPod anymore.

I have tried restoring my iPod by putting it into DFU mode, and when it is in recovery mode, iTunes can detect it, however after doing a restore, iTunes is once again oblivious to the presence of my iPod.

However, when I connect the iPod to my laptop (also running Win7 but 32bit), it is detected by iTunes and can even sync. Using a different user on this desktop however, still does nothing.

I have reinstalled iTunes numerous times, and with numerous versions (tried 9.1-9.2, currently 9.2.1), all of which did not work.

Any help would be appreciated.

Thanks