When I installed iTunes 7.3.1 my DVD and CD drives disappeared. Device manager indicates a blockage. The iTunes support forum suggests that another software product is causing the problem and to fix it means a regedit process that will probably end up causing another software product to no longer work correctly. After a little searching, I did notice the Roxio has a patch posted for a similar issue with the DLA driver. The patch name starts with D2D32_90_905.exe so I am wondering if this is a patch for drag-to-disk with EMC 9.1. Any ideas? Will this patch cause me a problem with 9.1 rev c?

I think you may want to try this one instead.

The only patch I knew about for DLA was the one to get the incompatible driver message to stop.I never installed Drag-to-Disc on Vista so I'm not sure about the patch.The 905 at the end makes me think it was for v9.05.Can you tell us where you're seeing that patch at?
In Device Manager are you getting the yellow exclamation mark?If so try deleting the drives and rebooting and see if Vista then recognizes them.

The patch is a Roxio patch from the DLA pinned post. Yes, the yellow exclamation point from Device manager is present. I tried deleting the drivers and rebooting. VISTA finds the drives and installs the drivers but the end results are the same. Maybe John from Roxio and shed some light on this issue.

don't think DLA patch applies to any 9.1 version. however, have you tried to uninstall both EMC 9.1 and iTune 7.3.1 then reinstall iTune 7.3 1 and see if your drive works properly? if it does, reinstall EMC 9.1 and see if you still have the same issue.

I uninstalled EMC 9.1 from my laptop and cleaned up the registry. Roxio EMC 9.1 leaves it pretty dirty. Then I installed iTunes 7.3.1 and after the install my DVD/CD drive was still appearing and functional. I then installed EMC 9.1 and everything is working. I did post an issue on the iTunes BB and the "experts" on that BB are basically suggesting that a product other than iTunes is causing the problem. The suggested regedit fix would repair iTunes at the expense of causing the offending product to not work properly. I really didn't like that approach. So, I picked the most likey candidate (EMC 9.1) as the culprit and uninstalled it. Low and behold iTunes then installed correctly.

Sequencing the installation of software shouldn't be a restriction and I don't like finger pointing by the vendors. One of these products is causing a problem and while I have circumvented the issue, I suspect that it may show up again in the future.

I haven't heard from Roxio if the DLA patch would correct the issue.