Quick Reference Guide 43Error MessagesCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in theProduct Information Guide.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 . T H E D E V I C E I S N O T R E A D Y — The drive cannotread the disk. Insert a disk into the drive and try again.I N S E R T B O O T A B L E M E D I A — Insert a bootable floppy disk, CD, or DVD.N O N - S YS T E M D I S K E R R O R — Remove the floppy disk from the floppy drive andrestart your computer.N O 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 Y A G A I N —Close all windows and open the program that you want to use. In some cases, you mayhave to restart your computer to restore computer resources. If so, run the programthat you want to use first.O P 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" in yourUser’s Guide).