and try it again. If it works, then the patch may have technology that blocks certain DVD functions. Microsoft has been very vocal about piracy where DVD copying is concerned. Could be they snuck that one in. If you can't do DVD creation and backing out the patch, then you have another issue.
and life goes on...
p.s. Have you tried Roxio's Media Creator?
After downloading the latest security patches from Microsoft, Nero 6 will not burn a good DVD. I tried using Copy2DVD and I had the same results. When trying to play back it give a unreadable error. I know it happened after the patches as I had just burned serveral DVD's before the upgrade. Has anyone had this type of problem? Also I noticed the Dvd I created before the patches had a uniform burn, but the (several)disk now have a profound burn line that is visiable