The dreaded Can't Sync with this iTunes on this PC message

Question

I’ve read most of the threads regarding this, but I can’t seem to find the appropriate answer as most of those deal with actually being able to sync to two different PC’s and that’s not what we want. We simply want to be able to sync with the original machine.
Symptom
The iPod is synced with another iTunes library. An iPod can only be synced with one iTunes library.
Background
My daughter manages her iTunes and iTouch on my machine only, but at one point plugged it into someone else’s machine to recharge it only. She mentioned that iTunes did pop up on the other machine but that she didn’t do anything regarding syncing. None of the music from the other machine is present on her iTouch, so we know that there was no syncing from the other PC to her iTouch
I Plugged in her iTouch to my PC as normal and got the above message.
The iTunes library here was blank although all the music files and purchases made on the PC were still resident on my machine.
It did recognized her iTouch, the only device we have by the way.
Seeing as I did not want to lose her purchases I clicked on transfer purchases and it did transfer back to iTunes all her purchased music and apps except for two that she purchased via WIFI, although those 2 tunes are still on her iTouch)
After the prior step, the library of other music that was resident on my machine still did not appear in iTunes.
I checked the preferences in iTunes and still recognized the folder where the music files are so that had me puzzled.
I then added the folder via the Add Folder To Library option and ITunes re-imported all the tunes back into iTunes, but I lost a lot of the associated folder artwork.
Problem still remains with the message “The iPod is synced with another iTunes library. An iPod can only be synced with one iTunes library.”
*What should I do?*
Thanks In Advance

Answer 1

You'll have to search all the hard drive for files with an ITL file extension.
Those are itunes database files for itunes libraries.
Make sure Windows Explorer is set to display file extensions.
Press *and hold* the shift key while starting itunes and browse to each ITL file that is found. See if you get the same message when plugging in the iPod to sync.
If you don't get that message, you've found the correct library file.
You'll probably want to move it to the default location before continuing.
Vaios have a habit of erasing the itunes library, BTW. The original library might have gotten completely erased by the sony software.
Look at PreShrunkPaul's post here for a fix
http://discussions.apple.com/message.jspa?messageID=9776063#9776063