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For your USB keyboard or mouse to work with MS-DOS-based utilities and non-Windows* modes, your computer must have USB Legacy Support enabled in the BIOS. USB Legacy Support allows the BIOS to interact with a USB keyboard, and in limited cases, a USB mouse.
Contents:
Symptoms if USB Legacy Support is Disabled
If USB Legacy Support is disabled in the BIOS, you will not be able to use your USB mouse or keyboard in any of the following situations:
- Running your computer in Safe mode.
- Using a Windows Startup menu.
- Starting your computer in MS-DOS mode (instead of opening a MS-DOS session from Windows).
- Starting your computer from a floppy disk or leaving a floppy disk in the drive when you turn on or restart your computer.
- Windows "blue screen" errors that ask you to "Press any key to continue".
- Responding to ScanDisk and other messages during the start-up sequence.
- Editing or upgrading the BIOS.
- Entering a BIOS password.
Check for and Enable USB Legacy Support
WARNING! Making incorrect changes to your computer's BIOS can cause serious, system-wide problems. Please follow these instructions explicitly.
- Shut down your computer: click Start > Shut Down, select "Shut Down" and then click OK. Turn off your computer.
- Connect a PS/2 keyboard to your computer
- Turn on your computer and enter the System Setup for BIOS before Windows starts.
- After you enter the BIOS, look for the USB Legacy Support setting. Usually, this setting is found under the Advanced, Peripheral, or Peripheral Configuration menu, however your BIOS may be different.
- Select USB Legacy Support and change the setting to Enabled. Do not change any other BIOS settings.
- Save the settings and exit the BIOS. Allow Windows to start.
Note: Each computer and BIOS have different ways of entering the BIOS settings. Typically, you press F1, F2, or the Delete key when the system is counting memory right after you turn on or restart your computer. Your computer may be different. When you turn on your computer, watch the screen and it may display instructions for how to enter the BIOS settings, such as "Press F2 for Setup". If the startup information scrolls too quickly for you to read, press the Esc or Tab key to see the start up sequence.
If you cannot change the BIOS settings, either because you cannot determine how to access them, or you are uncomfortable editing them yourself, contact your computer manufacturer for additional instructions.
BIOS does not have any settings for USB Legacy Support
You need to upgrade your computer's BIOS, if possible. Contact your computer manufacturer about obtaining the BIOS upgrade software and instructions.
Important! After you complete the BIOS upgrade, restart your computer, enter the BIOS's System Settings as described above and check whether USB Legacy Support is enabled. If necessary, enable it and save the BIOS settings before you exit.
If the new BIOS still does have not a USB Legacy Support setting, if the BIOS cannot be upgraded or if you choose not to upgrade the BIOS, you will be limited to using a PS/2* keyboard and, in the case of Safe mode, a PS/2 mouse during any of the situations listed at the beginning of this document.
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