Shutting down properly enables the computer to delete temporary files from RAM, which makes it run more smoothly the next time you start up. Microsoft makes a lot of applications. It would be most helpful if you could name the application specifically and give the version number. Avoid dropping ashes or food into the keyboard, and keep the immediate workspace clean. Susan and Justin's recommendations Before calling the helpdesk, people should shut down the computer and check to see that all the cables are securely attached.
Loose cables cause a lot of problems.
On a Mac, you shouldn't plug in or unplug any cables, especially the keyboard and mouse cables, while the power is on. It can cause a short in the keyboard, mouse, or the controller inside the computer, which can be costly. Try restarting or rebooting your computer. This occassionally fixes the problem. Have your system and program disks ready when AC staff come to work with your machine.