44Finding More Information and ResourcesIf you need to: See:reinstall your operating system. yourOperating System disc.find your system model number. the back of your computer.run a diagnostic program for your computer,reinstall desktop system software, or updatedrivers for your computer, and readme files.theDrivers and Utilities disc.NOTE: Drivers and documentation updatescan be found on the Dell ™ Support websiteat support.dell.com.learn more about your operating system,maintaining peripherals, RAID, Internet,Bluetooth ® , networking, and e-mail.the Dell Technology Guide available on yourhard drive.upgrade your computer with new or additionalmemory, or a new hard drive.reinstall or replace a worn or defective part.the Service Manual on the Dell Support websiteat support.dell.com.NOTE: In some countries, opening andreplacing parts of your computer may voidyour warranty. Check your warranty andreturn policies before working inside yourcomputer.