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GP Fault or Fatal Exception Error on Intel MMX CPU

Article ID: 156492 - View products that this article applies to.

This article was previously published under Q156492

SYMPTOMS

When you are running a program or using a device driver that calls MMX- specific instructions in the retail release of Windows 95 on a system with an Intel processor supporting the MMX instruction set, the following symptoms may occur:

A general protection (GP) fault error message
A fatal exception error message on a blue screen

This problem does not occur with Windows 95 OEM Service Release 2 or later.

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CAUSE

The retail release of Windows 95 does not properly support some MMX instructions if they are called from a device driver or from program code running in protection level 0 (Ring 0, also known as privileged or Kernel mode). If these instructions are issued while the processor is operating in Ring 0, a GP fault or other serious error may occur.

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STATUS

This problem no longer occurs in Windows 98. To resolve this problem, install the current version of Windows. For information about the current version of Windows, visit http://www.microsoft.com/windows

(http://www.microsoft.com/windows)

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Properties

Article ID: 156492 - Last Review: November 15, 2006 - Revision: 1.2

APPLIES TO

Microsoft Windows 95

kbhotfixserver kbqfe kbhardware kbprb KB156492

Retired KB Content Disclaimer

This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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