As well as the below, right click the program icon and select Run as Administrator, which is NOT the same thing as running the computer with the Administrator account, and which fixes several "odd" problems - Run as Administrator http://forums.adobe.com/thread/969395 (Encore AND Premiere)
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Odd Errors http://forums.adobe.com/thread/670174
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Long File Names or odd characters cause problems
Read http://forums.adobe.com/thread/588273
And #4 http://forums.adobe.com/thread/666558
And This Message Thread http://forums.adobe.com/thread/665641
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Things and Software to AVOID when authoring/burning a disc
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Start --> http://forums.adobe.com/thread/608660
#2 has WHY Explained http://forums.adobe.com/thread/607390
Plus http://forums.adobe.com/thread/562941
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Create a DVD output ISO file and then use the FREE Imgburn to write files or folders or ISO to disc for DVD or BluRay (send the author a PayPal donation if you like his program)
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Read http://forums.adobe.com/thread/1322583 for notes on installing Imgburn WITHOUT any toolbar add-ons
The PPro/Encore tutorial list in message #3 http://forums.adobe.com/message/2276578 may also help, with more help in message #5