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Yes, you will need to reinstall, but you will not lose your songs, they are linked to your account.
To do the reinstall, do it the following way please
Click start, control panel, programs, uninstall a program
Uninstall the below software in the following order. Then, restart your computer.
Apple Software Update
Apple Mobile Device Support
Apple Application Support (iTunes 9 or later)
Once you have restarted, install iTunes again from my link belowhttp://www.apple.com/itunes/download
Once done, it should then work.
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
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