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Q119118: Windows 95 Fails to Install on an 80386 Computer

Article: Q119118
Product(s): Microsoft Windows 95.x Retail Product
Version(s): 95
Operating System(s): 
Keyword(s): diskmem win95 kbDiskMemory
Last Modified: 28-JUL-2001

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The information in this article applies to:

- Microsoft Windows 95 
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SYMPTOMS
========

The Windows 95 Setup program fails or displays the following error message:

  Setup error B1: Setup has detected an 80386 processor that is not compatible
  with this version of Windows. Before you can run this version of Windows, you
  need to upgrade your processor. Contact your computer manufacturer for more
  information.

CAUSE
=====

Intel 386 microprocessors dated before April 1987 are known as B1 stepping
chips. These chips are known to introduce random math errors when performing
32-bit operations, thus making them incompatible with Windows 95.

RESOLUTION
==========

If your 386 chip was manufactured before April 1987 or has a label on it that
reads "For 16-bit operations only," contact your hardware manufacturer about a
microprocessor upgrade.

MORE INFORMATION
================

The product included here is manufactured by a vendor independent of Microsoft;
we make no warranty, implied or otherwise, regarding this product's performance
or reliability.

Additional query words: MHz locks freezes hangs err msg 16 20 dx compaq deskpro 386/20 b-step

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Keywords          : diskmem win95 kbDiskMemory 
Technology        : kbWin95search kbZNotKeyword3
Version           : 95

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