Sometimes your NOOK Color will not allow you to install any Apps. Perhaps you see an error message say "unable to download onto your device." Chances are your operating system needs updating and wont install apps until you get the new version.

You can try buying another app like Angry Birds (this app is highly recommended) but I'm very certain it wont install either.

Here is a link they provide on how to update:

http://www.barnesandnoble.com/u/nookcolor-support-software-update/379002520/#

Let us know if this works for you! You can also call B&N :-) at 1-800-the-book and they can also help over the phone

Additionally, you can also email them your serial number (tap settings > device info > about my nook > serial number) to This e-mail address is being protected from spambots. You need JavaScript enabled to view it