Article ID: 310923 - View products that this article applies to.
This article was previously published under Q310923
Your Universal Serial Bus (USB) keyboard or mouse may not work after you restart your computer in MS-DOS mode.
This problem can occur under either of the following conditions:
This behavior occurs because you cannot use a USB keyboard or mouse in MS-DOS mode without BIOS USB legacy support because the operating system uses the BIOS for device input; without USB legacy support, USB input devices do not work.
The operating system disables USB legacy support for 32-bit USB drivers to work. Windows typically re-enables USB legacy support when you restart your computer in MS-DOS mode unless the USB Host Controller resources have changed from the values that were assigned during Startup.
The operating system cannot restore BIOS-designated resource settings. If the current input/output (I/O) port settings are different from the BIOS settings, the device may be inaccessible and your computer may stop responding (hang).
There are several methods that you can use to work around this behavior:
How to Set the USB Host Controller to Use BIOS SettingsTo set the USB host controller to use BIOS settings:
For additional information about how to use Device Manager, click the article number below to view the article in the Microsoft Knowledge Base:
285122For additional information about problems that you may have with BIOS USB legacy support, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/285122/EN-US/ )How to Start Device Manager in Windows 98 and Windows Me
310922You can typically enable or disable USB Legacy support in your computer BIOS settings if your computer BIOS supports this feature. For information about whether your hardware supports USB legacy emulation, view the documentation that is included with your computer or contact your hardware manufacturer.For information about how to contact your hardware manufacturer, visit the following Microsoft Web site:
(http://support.microsoft.com/kb/310922/EN-US/ )Computer Hangs During Shutdown with USB Legacy Support Enabled in the BIOS
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