41Solving ProblemsLockups and SoftwareProblemsIf the computer does not start up — Ensurethat the power cable is firmly connected to thecomputer and to the electrical outlet.If a program stops responding — End the program:Press simultaneously.1.Click2. Applications.Click the program that is no longer3.respondingClick4. End Task.If a program crashes repeatedly — Check thesoftware documentation. If necessary, uninstalland then reinstall the program.NOTE: Software usually includes installationinstructions in its documentation or on thedisc (CD or DVD).NOTE: Your computer does not have aninternal optical drive. Use an externaloptical drive or any external storage devicefor the procedures that involve discs.If the computer stops responding or a solidblue screen appears —CAUTION: You might lose data if you areunable to perform an operating systemshutdown.If you are unable to get a response by pressinga key on your keyboard or moving your mouse,press the power button until the computer turnsoff and then restart your computer.If a program is designed for an earlierMicrosoft® Windows® operatingsystem —Run the Program Compatibility Wizard. TheProgram Compatibility Wizard configures aprogram so that it runs in an environment similarto an earlier version of Microsoft Windowsoperating system environments.