Problems with HL DT ST DVDRAM GMA 4082N

Hello!I’ve got a new Toshiba A100-749 and since two days ago I can’t read CDs or DVDs. Windows recognizes it. I’ve tried to install firmware but nothing happens.
I can’t format Windows Vista because it boots from DVD.
Can anyone help me?
Thanks

If your drive does not recognize a bootable CD/DVD during power up of your PC I’d say your drive is broken. This should not an windows or other operating system issue.

I supposed it was an hardware problem… :sad:
But it’s strange…I’ve formatted a cd-rw disc and then I installed CD BurnerXP (not compatible with Vista)…It didn’t recognize any devices.
If I try to format Windows (by DOS) can I resolve my problem?