It is a known fact that Apple may disable your Apple ID automatically for security reasons. One of the following alerts may appear when you try to use certain Apple services that require an Apple ID (e.g. iCloud, iTunes Store, or MobileMe), thus alerting you that your Apple ID has been disabled. Known alerts include:
“This Apple ID has been disabled for security reasons”
“Too many attempted sign-ins”
“You can’t sign in because your account has been disabled for security reasons”
“This Apple ID has been locked for security reasons”
How to Resolve This Issue:
Use iForgot (http://iforgot.apple.com/) to reset your account. This process will require you to either authenticate your ID by email or answer the security question(s) provided when you originally created your Apple ID. This should restore your account in a jiffy. Please note that if you are a MobileMe user, do enter your full MobileMe email address (email@example.com or firstname.lastname@example.org).
However, if your error happens to be: “Your Apple ID has been disabled” instead of “Your Apple ID has been disabled for security reasons” or anything mentioned above; performing the suggested reset for your Apple ID may not work. You may still access all of your Apple accounts without problems, but you may not be able to purchase or update your Apps. This means that your account is under investigation by Apple due to some of the more serious security concerns. You need to contact Apple support and it will probably take several days for Apple to resolve this issue. For further information on a related issue, read this article: How to Prevent iTunes Credit Card Fraud.