Microsoft KB Archive/812492

= Error message when you start your computer with a non-system disk =

Article ID: 812492

Article Last Modified on 2/1/2007

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APPLIES TO


 * Microsoft Windows XP Professional
 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Tablet PC Edition
 * Microsoft Windows XP Media Center Edition 2002
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Datacenter Server
 * Microsoft Windows Millennium Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows 98 Second Edition
 * Microsoft Windows 98 Standard Edition

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SYMPTOMS
When you start your computer, you may receive one or more of the following error messages:

Non-system disk or disk error

Replace and strike any key when ready

NTLDR is missing

Press any key to restart

Remove disks or other media.

Press any key to restart.



CAUSE
This issue may occur if your start device (such as a floppy disk drive, hard disk drive, or CD-ROM drive) does not contain boot files.



RESOLUTION
To resolve this issue, use one or more of the following methods, and then restart your computer:
 * Remove the non-system disk from your boot device. For example, remove the non-system disk from the floppy drive or the CD-ROM drive.
 * Change your computer's boot sequence. To do this, you must change your computer's setup and the option that controls which device your computer uses to start from. Make sure that you select a device that has boot files (or operating system files) installed.
 * If you start your computer from a hard disk drive, install a bootable operating system (such as Windows XP) on the drive.



MORE INFORMATION
For additional information about other possible causes for these error messages, click the following article numbers to view the articles in the Microsoft Knowledge Base:

318728 How to troubleshoot the &quot;NTLDR is missing&quot; error message in Windows 2000

255220 &quot;NTLDR is missing&quot; error message when you upgrade or install Windows 2000 over Windows 95, Windows 98 or Windows Millennium Edition

314057 &quot;NTLDR is missing&quot; error message when you upgrade or install Windows XP

318948 &quot;NTLDR is missing or corrupt&quot; error message during Windows 2000 or Windows NT 4.0 upgrade

228004 Changing active partition can make your system unbootable

315261 The computer does not start after you change the active partition by using the Disk Management tool

80304 &quot;Missing operating system&quot; and &quot;No ROM BASIC&quot; error messages

125480 Windows Setup was unable to update your system files

Additional query words: non-bootable nonbootable diskette

Keywords: kberrmsg kbprb KB812492

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