Lately I have been getting this message on my work PC when it tries to enter standby mode after a period of inactivity:

The device driver for the "floppy disk drive" device is preventing the machine from entering standby. Please close all applications and try again. If the problem persists, you may need to update this driver.

Anybody seen this and know how to fix it?

HP Vectra VL420 - P4/1.8, XP Pro SP1