My ipod touch 16gb won't restore, it won't get past, "Preparing iPod software for update". I've tried everything. What do I do?

The iPhone could not be restored. An unknown error occurred. Update to iTunes 7.5 or later.

Simply restarting your Mac or Windows PC may allow you to successfully restore your iPhone. Connect iPhone to a different USB port on your Mac or Windows PC. USB 2.0 ports that are built-in to the computer are preferred.

If your computer has front and rear USB ports, try a port on the other side of the computer. After doing this, attempt to restore your iPhone in iTunes. Remove all USB devices except the keyboard, mouse, and the iPhone.

Connect the iPhone directly to the supplied USB cable, bypassing the iPhone Dock. Remove all USB hubs and connect directly to the computer. Attempt to restore on a different computer.

Ensure that the computer you are restoring on has USB 2.0 ports. Create a new user account and then restore iPhone. Use the steps below if you're not sure how to create a new user.

After creating the new user, log in to that account, open iTunes, and determine whether the issue you were experiencing persists in this new user. From the Start menu, choose Control Panel. Open User Accounts.

Select Create a new account and follow the instructions to complete the account setup process. Once the new account is created, choose Log Off from the Start menu. Log in to the newly created user account.

Choose Apple menu > System Preferences. Choose View > Accounts. Click the "+" (you may need to authenticate to be able to click this).

Give the new user a name and short name and enter a password. Select the checkbox for "Allow user to administer this computer". This makes the user an administrator user.

Click Create Account.