Microsoft KB Archive/123814

= Win NT Err Msg: MBR Checksum Error: A Virus May Be Present... =

PSS ID Number: 123814

Article Last Modified on 10/29/2003

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The information in this article applies to:


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Server 3.5

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This article was previously published under Q123814



SUMMARY
If Windows NT detects a problem with the Master Boot Record (MBR), the following message appears:

MBR checksum error: a virus may be present. Verify Master Boot Record integrity.



MORE INFORMATION
MBR problems are frequently caused by boot sector viruses. Microsoft has confirmed that versions of the Stoned and Josh viruses can cause the MBR checksum error message.

This problem most often occurs when you have set up Windows NT using WINNT.EXE. The floppy disks for a CD-ROM installation can become infected when you run DIR from an infected MS-DOS computer.

If the MBR checksum error message occurs during setup, Windows NT Setup does not continue. If this happens, run an anti-virus program to remove the virus.

Additional query words: prodnt NT infected

Keywords: KB123814

Technology: kbWinNT350search kbWinNTS350 kbWinNTS350search kbWinNTsearch kbWinNTSsearch kbWinNTW350 kbWinNTW350search kbWinNTWsearch

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