Intermittent System Hangs with OPTI-495SLC Chipset

 Last reviewed: October 27, 1995
Article ID: Q138741
The information in this article applies to:
  • Microsoft Windows operating system versions 3.0, 3.0a, 3.1, 3.11
  • Microsoft Windows for Workgroups versions 3.1, 3.11
  • Microsoft Windows 95

SYMPTOMS

When you are running any of the listed Windows versions, your computer may occasionally stop responding (hang). This problem is known to occur on computers with the following chipsets: 

   OPTI-495SLC

CAUSE

The Turbo Switch feature of your system ROM BIOS is enabled. This feature causes the computer to monitor keyboard input for a particular series of keystrokes. When this series of keystrokes is detected, the computer is placed in Turbo mode.

Windows also queries the keyboard periodically. When the computer and Windows attempt to query the keyboard at the same time, your computer may hang.

RESOLUTION

Disable the Turbo Switch feature of your system ROM BIOS. For information about how to do so, contact your computer manufacturer.

MORE INFORMATION

The third-party products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

KBCategory: kb3rdparty kbsetup kbhw kbenv
KBSubcategory: win95
Additional reference words: 95 ami opti495slc opti 495slc opti495 495 slc

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Last reviewed: October 27, 1995
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