Tl;dr: My delete key stops responding anytime Precision X16 5.3.10 is open? The problem is specific to when the GUI is up and active. If I minimize the application to the system tray the delete key resumes operation. I am running Windows 7 x64. I can reproduce this issue with both PS/2 and USB keyboards. What else do you need to know? Is there any way to make it stop blocking the delete key, or is it hard-coded in the application?