If, however, when you try to play the content and a message appears indicating that system activation is required, you must manually activate your system. Normally, your system is activated automatically when you purchase or download content.
To use the content on that system, you will have to first deactivate one of your other systems. When the number of activated systems has reached the limit, a message will appear when you attempt to download (purchase) content on an unactivated system. You can link your Sony Entertainment Network account to multiple systems, but the number of systems that you can activate per content type is limited for each account. Content and applications available from PlayStation®Store can only be used on activated systems. System activation is a procedure for protecting content copyrights and other digital rights.
