Hi,
Thank you for posting your question on Microsoft Community!
As per the problem description, you have an issue with iTunes performance. We need more information to assist you better; I would request you to send us more information as listed below.
Did you make any changes to the computer prior to this issue?
I would suggest you keep the computer in clean boot status.
How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8.
http://support.microsoft.com/kb/929135
Note: Please go through step 3 of the Kb to keep the computer in normal startup after fixing the issue.
You can try to fix the issue by uninstalling, reinstalling the iTunes.
Refer to link:
http://support.apple.com/kb/HT1923
You can refer to:
iTunes Error (-1202)
https://discussions.apple.com/message/20711293#20711293
Hope this helps. Please reply with more information to assist you further, we’ll be glad to assist you!