Hi,
Try the following.
Open windows Control Panel and open Device Manager. Expand DVD/CD-ROM Drives, then right click the drive and select Uninstall.
When done, download and reinstall the Chipset driver on the following link.
http://ftp.hp.com/pub/softpaq/sp59501-60000/sp59647.exe
When complete, shut down the notebook by holding down the Shift key as you click Shutdown to temporarily prevent a hybrid boot. Then unplug the AC Adapter and then remove the battery. Hold down the Power button for 30 seconds. Re-insert the battery and plug in the AC Adapter.
Tap away at the esc key as you start the notebook to launch the Start-up Menu and then select f10 to enter the bios menu. Press f5 to load the defaults ( this is sometimes f9, but the menu at the bottom will show the correct key ), use the arrow keys to select 'Yes' and hit enter. Press f10 to save the setting and again use the arrow keys to select 'Yes' and hit enter.
As you boot into Windows, the optical drive will be reinstalled, but let windows fully load for a couple of minutes before checking.
Regards,
DP-K