Knowledge Base

Trap 0x00000024 Occurs During the Autochk Sequence at Boot

Article ID: 163507

Article Last Modified on 11/1/2006

Microsoft Windows NT Workstation 4.0 Developer Edition
Microsoft Windows NT Server 4.0 Standard Edition

This article was previously published under Q163507

SYMPTOMS

You cannot boot with the removable media in a drive.

CAUSE

This problem occurs because an I/O Request Packet (IRP) is stuck in the Driver\Disk, causing disk corruption. The Class2.sys file relies on the I/O system to complete its synchronous requests. These requests may never finish if Asynchronous Procedure Calls (APCs) are blocked. This will only occur when removable media is present during the boot process.

RESOLUTION

Install the new Class2.sys driver, which no longer relies on the I/O system to complete its synchronous requests.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. This has been corrected in the latest U.S. Service Pack for Windows NT version 4.0. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without spaces):

S E R V P A C K

Additional query words: prodnt removable media

Keywords: kbhardware KB163507