Some users encounter the ds4Windows not working issue during the game-playing process. That means the DS4 controller could stop working and be disabled automatically. It is likely that the errors in DS4 Windows software cause the issue. In this case, you can correct it by re-enabling controller.

DualShock4Windows is a portable program that allows you to get the best experience while using a PS4 Controller (or any of the supported gamepads) on your PC. By associating your connected controller to one fully re-mappable virtual Xbox 360 or DualShock 4 gamepad, many more games are accessible.

Use a small, unfolded paper clip (or something similar) to press and hold the reset button for at least five seconds. Your controller should now have been reset. Connect your controller to the PS4 console using the official USB cable. Connect to a USB port on the front (or rear) of the PS4 console.

Most software that does the same thing will conflict if used simultaneously. Under the hood, DS4Windows and Steam Input do the same; XBOX/xinput controllers emulation. Just disable Steam Input and there should be no conflicts. Steam --> Settings --> Controller and set "PlayStation Controller Support" to "Not Enabled".