Re: I am having a problem entering redemption code. I can enter numbers but when I try to enter any letters it's like the computer is locked up, but it's not on any other application

It sounds like you are trying to use a redemption code (alpha-numeric) where you are supposed to be using a serial number (strictly numeric).  A redemption is normally used to acquire a serial number... the serial number is what you enter to activate the software.

Redemption Code Help

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http://helpx.adobe.com/x-productkb/global/redemption-code-help.html