Microsoft KB Archive/270862

= You receive an &quot;OS Loader V4.01 Disk I/O Error Stats=00000001&quot; error message when you install Office 2000 =

Article ID: 270862

Article Last Modified on 1/27/2007

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APPLIES TO


 * Microsoft Windows NT 4.0
 * Microsoft Office 2000 Premium Edition
 * Microsoft Office 2000 Professional Edition
 * Microsoft Office 2000 Standard Edition
 * Microsoft Office 2000 Small Business Edition
 * Microsoft Office 2000 Developer Edition
 * Microsoft Access 2000 Standard Edition
 * Microsoft Excel 2000 Standard Edition
 * Microsoft FrontPage 2000 Standard Edition
 * Microsoft Outlook 2000 Standard Edition
 * Microsoft PowerPoint 2000 Standard Edition
 * Microsoft Word 2000 Standard Edition

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This article was previously published under Q270862



WARNING:This information is preliminary and has not been confirmed or tested by Microsoft. Use only with discretion.



SYMPTOMS
When you try to install Microsoft Office 2000, you receive the following error message when you restart the computer:

OS Loader V4.01

Disk I/O Error Stats=00000001

Windows NT could not start because the following file is missing or corrupt:

c:\winnt\system32\c_1252.nls

The operating system will not start.



CAUSE
This behavior occurs when all the following conditions are true:


 * Your computer's operating system is Microsoft Windows NT 4.0 Workstation.
 * The system partition or the boot partition of the Windows NT 4.0 Workstation installation is greater than 7.8 gigabytes.
 * The partition in question is formatted in the NTFS file system.

NOTE: This behavior may also occur with Microsoft Windows 2000 Professional if the computer BIOS does not support INT 13 extensions.



RESOLUTION
Decrease the boot partition size and the system partition size below 7.8 gigabytes.



MORE INFORMATION
Office Setup replaces National Language Support files (C_*.nls). Microsoft Windows NT 4.0 Workstation is limited to 7.8 gigabytes or less for the system partition and the boot partition. If one of these National Language Support files is placed outside of the 7.8 gigabyte range, you receive an error message similar to the one in the &quot;Symptoms&quot; section of this article.

NOTE: This problem is not unique to Office 2000. This problem may occur after you install any software that replaces system files, and the conditions in the &quot;Cause&quot; section of this article are met.

For additional information about system and boot partition limitations, click the following article numbers to view the articles in the Microsoft Knowledge Base:

224526 Windows NT 4.0 supports maximum of 7.8-GB system partition

98080 1024 Cylinder Limit, How Windows NT Gets Drive Geometry

161563 How Windows NT Handles Drive Translation

154052 Explanation of X86 Boot Drive Limitations

Additional query words: OFF2000 restart boot booting reboot rebooting

Keywords: kbtshoot kbsetup kberrmsg KB270862

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