I have Nero7 and I backed up a lot of my video projects onto 7 dvds. I've
tried to restore them and all I get is the error message-
Failed to create NBService object. -2147023836: The specified service does
not exist as an installed service.

When I go through the program with disk 1 in the drive I get-
Please insert the source disc with the following volume label in the
selected drive: MyDocs230706. To ensure you have selected the the correct
disc, please compare the following disc ID with the one that can be found in
the file NB.txt located on the root of your backup disc F46B....etc.

I've not been able to restore the files. Can anyone help?

I had an identical problem to this after doing a recent upgrade to my Nero software. It looks like the required system service, called NBService, had been uninstalled by the update process but not reinstalled.

I fixed the problem by uninstalling and reinstalling Nero BackItUp. Note that you can just uninstall and reinstall this component using the product setup dialogue, you don't have to reinstall everything.

I found that all my backup job information and option settings was preserved through this process so everything is now back to normal.

I hope this helps.