None of that advice was of use to me and my specific problem. So thanks again, but as stated earlier, you have just pointed out something i have read over and over agin in lots of post on many different forums. There are hundreds of posts on forums about deleting REG UPPER & LOWER FILTERS etc.but as you will see, there are a number of people with a big problem with regard to this particular DVD-RAM uj-850s drive and i am happy to report that i followed the instructions given on the site i refer to in my thread and it worked fantasticly and i also had the added benefit of, having certain other hardware become usable again If the device once worked fine with Windows Vista, please check the connection between UJ-811 and motherboard (You may plug the cable out and in). If the problem only occurs with a certain disk, I suggest you to make a copy of it and try again. Then i thought i did a post with this but cant find it. MATSUSHITA DVD-RAM UJ-841S DRIVER DOWNLOAD - Thursday, December 15, Later I was updating with all the updates of Microsoft for the windows xp.
DRIVER FOR MATSHITA DVD RAM UJ 820S DRIVERS
The solution which worked for me i have posted a new thread here: Please contact Matshita/Panasonic to confirm whether I can work with Vista. MATSHITA UJ 820S DRIVERS - On the Hardware tab, click Device Manager. This DVD driver is known to disappear on Windows 10 after an upgrade. But i am afraid that your good advice did not solve my problem, and that is why i have posted for the benefit of many people i have seen on forums with this very same issue.