I have found that this problem is almost always due to some sort of virus or malware protection on the computer. If you have the sort of security software that "protects" certain processes (I use Comodo which has the Defense+ security), it will often think that publishing a projector is a virus-like activity and prevent it. Try to disable it and see if that helps. Also, Windows comes built in with an AntiMalware Service (part of Security Essentials) which is known to cause this problem. Disabling that may also help.
is the UAC set to the lowest level.
do you start Director as Administrator.
Thanks to both of you for your help. It took all three actions to get D11 back to normal. That is, lowering UAC to lowest level, running D11 ad Admin, and disabling MS Essentials. But for some strange reason, all my buttons in author mode now require double-clicks instead of single clicks. Weird. But for the most part, the Adobe gods are smiling again. Thanks guys, much appreciated!
the Adobe Goods are old and wise.