hi tina, sometimes the hand is quicker than the brain, the flashing may have indicated the library of this other owner was still loading.
Your ipod itunes should be stored locally in your account.
For Microsoft Windows XP and 2000 the iTunes folder is stored in
\Documents and Settings\[your username]\My Documents\My Music\
How to re-create your iTunes library
http://support.apple.com/kb/HT1451http://support.apple.com/kb/HT1660Did you ever make a backup?
How-To: Backup your Windows iTunes library
http://uneasysilence.com/how-to-backup-your-windows-itunes/It might be a good idea to copy out the music of this other owner and merge it with yours, if you want to use any of it or delete his libraries all together and replace it with yours be done with that problem.
You may have to format the ipod now.
then plug it in correctly and upload once again from your own library.
Make his F drive your default so that this doesnt happen again.
See if these can assist you, it's important you know the tricks from others who have sufered the loss of their precious music with Itunes proceedures.
By default iPod is set to "Automatically sync songs to my iPod" sometimes called automatic mode. In order to transfer music from multiple computers iPod must be set to "Manually manage music" sometimes referred to as manual mode.
http://support.apple.com/kb/HT1202How to copy music from your iPod to your iTunes library
http://it.toolbox.com/blogs/ontherun/how-to-copy-music-from-your-ipod-to-your-itunes-library-5615Good Luck hope these help fingers crossed.
Merete