Quick Reference Guide 17Storing a BatteryRemove the battery when you store your computer for an extended period of time. A batterydischarges during prolonged storage. After a long storage period, recharge the battery fully beforeyou use it.Solving ProblemsNotebook System Software (NSS)If you reinstall the operating system for your Dell™ computer, it is also recommended to reinstallthe NSS utility. The utility is available on the optional Drivers and Utilities CD and on the DellSupport website at support.dell.com.To download the utility, go to Downloads at support.dell.com and select your computer modelfrom the drop-down menu. Under Select Your Download Category, select System andConfiguration Utilities, select your operating system and language, and then follow theinstructions.NSS provides critical updates for your operating system and support for Dell™ 3.5-inch USB floppydrives, Intel® Pentium® M processors, Intel Celeron® M processors, optical drives, and USBdevices. NSS is necessary for the correct operation of your Dell computer. The softwareautomatically detects your computer and operating system and installs the updates appropriate foryour configuration.NOTE: NSS is critical for the correct operation of USB devices.Lockups and Software ProblemsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in theProduct Information Guide.The computer does not start upThe computer stops respondingNOTICE: You might lose data if you are unable to perform an operating system shutdown.EN 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 LO U T L E T .TU 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.