Notepad stops working while Pro Tools is playing

Hi experts,
When, I open Notepad and type in it while Pro Tools is playing. It appears that Pro Tools thinks Notepad is a part of its own programming and tries to get Notepad to access DAE.dll. Guess there is some quirky "focus" "calling" going on in Pro Tools. Notepad kind of seizes up, but works okay after a few re-focuses. How to fix it?
Thanks in advance.

Error Message: This application has failed to start because DAE.dll was not found. Re-installing the application may fix this problem
