solution to fix

in Windows XP

Vista too

caused either by malware

or by software following a Windows update or some other software installation or uninstallation (particularly HP, Norton or QuickTime software) trying to check for removable media that isn't there

(e.g. disc in DVD drive or card in card reader), when it shouldn't be

try these

scan your computer with a virus checker and anti-spyware

try changing your drive letter assignments

step by step howto below

try uninstalling your floppy drive

or just always keep media in all your drives

try making your software stop looking for drives: e.g. uninstalling and reinstalling an upgraded (or latest possible) version of QuickTime; similarly with your Norton and HP software if you have any, and clearing your most recently used documents or files lists

last resort: make the error message go away

How to change your drive letter assignments