"Windows Error, Drive not ready" Problem

Hi all,
Whenever I shut down my computer or log off my recently built computer, it shows me a boxed message saying that:

Windows error - Drive not ready
The driver is not ready for use; its door maybe open. Please check drive A: and make sure that a disk is inserted and that the drive door is closed.
<Cancel><Try Again><Continue>

Anyone got any idea what it means?
My computer works ok during windows, I only get this message when i log Off.

My drives are 2x NEC 3550 Dvd Rw
And MB is ASUS P5B Deluxe

Cheers

Do you have an A: drive ? A floppy disk drive I mean . It could be your Anti Virus settings is looking to scan A: before log off . I don't have it anymore but Norton is notorious for that . Or you have a disk stuck in the floppy . Sounds kinky no . ;)

Actually I dont have a floppy drive installed anywhere.
I didn't need one anymore.

Do you have norton or anther antivirus that scans floppys when it shuts down?

If you don't have a floppy but the bios still has one listed it could be the problem. Make sure for removable drives it lists none.

Yep fixed it by disabling it in bios,

Just have another small problem now....

In Device manager there is a yellow icon and its implying that I still have something that isnt intsalled properly, it says Unkown but if I click on it it says on the x1900??
now my graphics card is an x1900gt but i have already installed omega drivers for it and its working great?

Any ideas how to fix it, cos also everytime I log on i get a found new hardware box pop up with no name asking me for drivers?

You could just try to uninstall it and than restart and it would probably be fixed.

Thanks for advice