18 Quick Reference GuideTroubleshootingLockups and Software ProblemsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in theProductInformation Guide.The computer does not start upE N S U R E T H A T T H E AC A D A P T E R I S F I R M L Y C O N N E C T E D T O T H E C O M P U T E R A N D T O T H E E L E C T R I C A L O U T L E T .The computer stops respondingNOTICE: You might lose data if you are unable to perform an operating system shutdown.T U R N T H E C O M P U T E R O F F — If you are unable to get a response by pressing a key on your keyboard ormoving your mouse, press and hold the power button for at least 8 to 10 seconds until the computerturns off. Then restart your computer.A program stops responding or crashes repeatedlyNOTE: Software usually includes installation instructions in its documentation or on a floppy disk or CD.E N D T H E P R O G R A M —1 Press simultaneously.2 Click Task Manager.3 Click the program that is no longer responding.4 Click End Task.C H E C K T H E S O F T W A R E D O C U M E N T A T I O N — If necessary, uninstall and then reinstall the program.A program is designed for an earlier Microsoft® Windows® operating systemR U N T H E P R O G R A M C O M P A T I B I L I T Y W I Z A R D — The Program Compatibility Wizard configures a programso that it runs in an environment similar to non-Windows XP operating system environments.1 Click Start→ All Programs→ Accessories→ Program Compatibility Wizard→ Next.2 Follow the instructions on the screen.A solid blue screen appearsT U R N T H E C O M P U T E R O F F — If you are unable to get a response by pressing a key on your keyboard ormoving your mouse, press and hold the power button for at least 8 to 10 seconds until the computerturns off. Then restart your computer.