|Some DVD drives cannot read some disks. This is normal. But the number of unreadable disks should be very few.|
What software player do you use for store-bought DVDs ?
Updating firmware, I understand. But what is updating drivers ?
The following is taken from Sony web site
"All of the Sony internal optical drives are plug & play with Windows so no drivers are required for detection in your pc. If you are having issues getting your drive detected then please try the following:
Ensure the Sony drive is set as a secondary master by itself. If you have another disc burner or a zip drive on the same IDE cable, please separate them.
Ensure you have the latest Service pack for your Windows operating system and any other updates for your system installed.
Please remove your secondary IDE channel from the Device Manager. To do this:
Right click on My Computer and then left click on properties.
Choose hardware tab.
Select Device Manager.
Click on the + in front of IDE/ATAPI controller.
Right click on secondary IDE and then choose uninstall.
Restart your computer.
Ensure you have the latest BIOS and Motherboard updates for your system.
Click here for a step-by-step hardware installation instructional video for the Sony internal Optical products."
By the way, do you have this firmware installed ?