Windows 7 - dvd drive disappeared after updating windows 7 ultimate x64

someone help my dvd drive disappeared after updates of windows 7 ultimate on my toshiba laptop satellite A205. in BIOS it is showning optical disk drive : NONE.. someone help please.it is not even booting. i have googled for various options none is doing the trick

Boot from bootable DVD, did that work in the past and not anymore? Was it visible in BIOS in the past?

Does bios see the harddrive, and can you boot from harddrive?

yeah it was bootable before.yea the hard disk is is bootable.

So the only problem is: bios doesn't detect dvd reader/writer. So Windows 7 doesn't detect it as well.

Does the dvd tray open? If you insert a dvd ... does it spin?
Has nothing to do with updates! Or did you a dvddrive firmware update?

it is a multiboot system with windows xp and windows 7 was wondering if i formated the windows 7 drive if it will bring any complications

yea it is opening normally

yeah it spins and the indicator light flickers

winxp doesn't see dvddrive ass weel I assume?

Why do you want to format win7drive? Are winxp and Windows 7 installed on same physical disk?

i was having problems with windows xp i tried to repair it but wasnt gettig an activated one. i decided to install windows 7 on the second partition and all went well till when i updated it. bt with windows xp safe mode it is showing the dvd drive