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Universal Serial Bus Devices Do Not Work in Safe Mode

This article was previously published under Q195241
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After you attempt to start your computer in safe mode by holding down theCTRL key, or by using the System Configuration utility to enable theStartup menu, your computer may not respond to any keyboard commands, or you may receive the following error message:
Windows Mouse Support

Windows did not detect a mouse attached to a computer. You can safely attach a serial mouse now.

To attach a mouse to a PS/2 mouse port, you must first turn the computer off.
The behavior can occur if you are using a Universal Serial Bus (USB) keyboard or mouse and your system basic input/output system (BIOS) does not support USB devices. Windows 98 and Windows 95 do not support the use of a USB keyboard or mouse in Safe mode or in Real mode unless the computer BIOS supports these devices.
To work around this behavior, use a standard keyboard or mouse instead of aUSB keyboard or mouse.
This behavior is by design.
In the case of USB input devices, in order for them to function in Safe mode, the system must have a BIOS with USB support for input devices and USB legacy mode must be enabled.

NOTE: All other USB devices are not loaded in Safe mode, unless the manufacturer requires it and provides BIOS support for that USB device in addition to input devices.

Article ID: 195241 - Last Review: 12/05/2015 09:36:39 - Revision: 2.1

Microsoft Windows Millennium Edition, Microsoft Windows 98 Standard Edition, Microsoft Windows 95

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