You can try to update to the latest version of iTunes. You can refer to the article on Apple support.
If the troubleshooting steps do not help, try this solution on Apple support.
Do write back with the results.
Please revert for clarification.
Thanks and Regards,
iTunes had been working perfectly for me for a while now, but when I booted up my computer today and tried to run it, it would not start. The little circle next to the pointer would spin for a few seconds and then stop. Then nothing would happen. I can right click iTunes and run it as admin, and it will run. But it will only play some songs and will not allow me to add any new songs to my library.
I have tried uninstalling and reinstalling, cleaning the registry, etc. but nothing has worked.
I am running Windows 7 64-bit