O P E R A T I N G S YS T E M N O T F O U N D — Reinstall the hard drive (see your Service Manual at support.dell.com). If the problem persists, contact Dell (see "Contacting Dell" on page 65).
O P T I O N A L ROM B A D C H E C K S U M — The optional ROM has failed. Contact Dell (see "Contacting Dell" on page 65).
AR 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 open is missing an essential file. Remove and then reinstall the program.
Microsoft® Windows Vista®:
1Click the Windows Vista start button 
→ Control Panel→ Programs→ Programs and Features.
2Select the program you want to remove.
3Click Uninstall.
4See the program documentation for installation instructions.
Microsoft Windows® XP:
1Click Start→ Control Panel→ Add or Remove Programs→ Programs and Features.
2Select the program you want to remove.
3Click Uninstall.
4See the program documentation for installation instructions.
S E C T O R N O T F O U N D — The operating system cannot locate a sector on the hard drive. You may have a defective sector or corrupted FAT on the hard drive. Run the Windows
S E E K E R R O R — The operating system cannot find a specific track on the hard drive.
S H U T D O W N F A I L U R E — A chip on the system board may be malfunctioning. Run the System Set tests in the Dell Diagnostics (see "Dell Diagnostics" on page 38).
TI M E - O F - D A Y C L O C K L O S T P O W E R — System configuration settings are corrupted. Connect your computer to an electrical outlet to charge the battery. If the problem persists, try to restore the data by entering the system
Troubleshooting
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