Troubleshooting 21Error MessagesCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions that shipped with your computer. For additional safety bestpractices information, see the Regulatory Compliance Homepage atwww.dell.com/regulatory_compliance.If the error message is not listed, see the documentation for the operatingsystem or the program that was running when the message appeared.A F I L E N A M E C A N N O T C O N T A I N A N Y O F T H E F O L L O W I N G C H A R A C T E R S : \ / : * ? “ <> | — Do not use these characters in filenames.A R E Q U I R E D .DLL F I L E W A S N O T F O U N D — The program that you are trying to openis missing an essential file. To remove and then reinstall the program:Windows XP:1 Click Start→ Control Panel→ Add or Remove Programs→ Programs and Features.2 Select the program you want to remove.3 Click Uninstall.4 See the program documentation for installation instructions.Windows Vista:1 Click Start → Control Panel→ Programs→ Programs and Features.2 Select the program you want to remove.3 Click Uninstall.4 See the program documentation for installation instructions.drive letter : \ I S N O T A C C E S S I B L E . TH E D E V I C E I S N O T R E A D Y — The drivecannot read the disk. Insert a disk into the drive and try again.IN S E R T B O O T A B L E M E D I A — Insert a bootable CD or DVD.NO T E N O U G H M E M O R Y O R R E S O U R C E S . C L O S E S O M E P R O G R A M S A N D T R YA G A I N — Close all windows and open the program that you want to use. In somecases, you may have to restart your computer to restore computer resources. If so, runthe program that you want to use first.OP E R A T I N G S YS T E M N O T F O U N D — Contact Dell (see "Contacting Dell" onpage 137).IEEE 1394 Device ProblemsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions that shipped with your computer. For additional safety bestpractices information, see the Regulatory Compliance Homepage atwww.dell.com/regulatory_compliance.