Itunes not working

1. Quit iTunes.

2. Locate your iTunes folder.

Operating System Default location of iTunes Folder
Microsoft Windows XP and 2000 Documents and Settings[your username]My DocumentsMy Music

Microsoft Windows Vista Users[your username]Music
Microsoft Windows 7 Users[your username]My Music

3. Open your iTunes folder.

4. Drag the iTunes Music Library.xml to the Desktop

5. Drag the following file from your iTunes folder to the Trash:
Microsoft Windows "iTunes Library.itl" (in versions of iTunes prior to 4.9 this was called "iTunes 4 Music Library.itl")

6. Open iTunes.
Important: Do not add any content into iTunes at this point.

7. Choose File > Library > Import Playlist.

8. Navigate to the iTunes Music Library.xml file on the Desktop.
Windows users: Click Open.

Method One
If you share your computer with other people, you can maintain separate user accounts for each person who uses the computer. This is useful especially if each user has different tastes in music; users can maintain separate, personalized iTunes music libraries and can customize their iPods accordingly.

Mac OS X users:
Learn how to set up additional user accounts.

Windows users:
Look in your computer's Help documentation to learn how to set up additional user accounts. To locate this information:

Click the Start Menu, and then click Help or Help and Support.
Enter "new user" in the Search field.
Press Return.
If you create multiple user accounts on one computer but want the same music to be available in iTunes for all users, see iTunes: How to share music between different accounts on a single computer.




Method Two

You may use multiple iPods on a computer without the need to create multiple user accounts. To do this, you can set iTunes to update each iPod with only certain playlists. This method allows you to put all your music on, say, your iPod and keep your iPod shuffle updated with only your workout music. Here's how to do this with iTunes 9:

Create new iTunes playlists that contain all the music that you want to sync to each iPod.
Learn how to Sync your iPod (read the iPod Tutorial Steps section below the video).
Note: iTunes for Windows does not support syncing multiple iPod devices at the same time.



Method Three

Create a separate iTunes library for each iPod. Note: It is important that you make a new iTunes Library file. Do not just make a copy of your existing iTunes Library file. If iTunes is open, quit it.

Mac users: Hold down the Option key while you open iTunes.
Windows users: Hold down the Shift key while you open iTunes.
In the dialog that appears, click Create Library.
Name and save the alternate library file. iTunes opens with your brand new library file.
Open iTunes Preferences. Choose iTunes > Preferences (Mac) or Edit > Preferences (Windows).
Click the Advanced tab.
Deselect the "Copy files to iTunes Media folder when adding to library" checkbox if it is already selected and click OK. This will prevent iTunes from creating duplicates of your existing media files in the new library folder.

Add the specific media files you want on your iPod to iTunes either by dragging them into iTunes or choosing File > Add to Library (Mac) or File > Add File to Library or Add Folder to Library (Windows).

Once you have the iTunes Library just how you want it, connect and sync your iPod.

Once the sync is complete, quit iTunes.
Mac users: Hold down the Option key while you open iTunes.
Windows users: Hold down the Shift key while you open iTunes.
Click Choose library.
Choose your original iTunes Library and click Choose (Mac Users) or Open (Windows Users). You can now switch back and forth between the different libraries for different iPods.