The LED lights that represent certain keys on a USB keyboard do not resume their previous status after you resume a Windows Vista-based computer from sleep or from hibernation
Consider the following scenario:
- You are running a Windows Vista-based computer.
- The computer has a universal serial bus (USB) keyboard connected to it.
- You resume the computer from sleep or from hibernation.
In this scenario, the LED lights that represent the NUM LOCK key, the CAPS LOCK key, and the SCROLL LOCK key on the USB keyboard do not resume their previous status. These lights remain turned off regardless of the status of the NUM LOCK key, the CAPS LOCK key, and the SCROLL LOCK key.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB939334.