If Windows asks a program perform something like the keystroke or shut down but the program fails to respond within a set period of time, the application is marked as "Not Responding".
Application is Not Responding Error - If Windows program isn't responding or stops working, it could be caused by a variety of issues. A issue between the software and the hardware within the computer, the absence of system resources or software bugs may result in Windows programs to cease to function. In order to resolve the program inactive, there's a variety of ways to fix it. We will walk you through each step in order to fix the program that is not responding. We suggest reviewing and attempting each step of troubleshooting in order because they all build on each one.
