Hi Teresa,
Were there any changes (hardware or software) made to the computer prior to the issue?
Disabling the filter keys can resolve the issue. The issue could have also occured due to some keyboard shortcuts settings that is related to locking up of the keyboard.
Method 1: Disable the Filter keys and check if it works.
a: Type Ease of access in the start search box and hit enter.
b: Now click Change how your keyboard works
**c:**Remove the check mark from the box next to Turn on FilterKeys.
**d:**Click the blue Set Up FilterKeys link
e: Underneath Keyboard shortcut, remove the check mark from the box next to Turn on FilterKeys when right SHIFT is pressed for 8 seconds.
f: Now click Ok two times.
Method 2: If the issue persists, then you need to contact Asus support for better assistance.
**http://support.asus.com/ServiceHome.aspx?SLanguage=en**
Please reply if you have any questions.