There are a lot of helpful articles and tutorials in the Getting Started section of the Dreamweaver Developer Center. To work successfully with Dreamweaver, you need a solid understanding of HTML and CSS. There are free tutorials for both at HTML Dog:
Also check out Get up to speed with CSS layouts.
This issue has been fixed in the 12.1 Creative Cloud update. A fix for perpetual licence holders is in the works. More details.
If Dreamweaver is acting erratically, or if you see a message saying "the following JavaScript error(s) occurred", it's usually a sign of a corrupt cache file. The first thing to try should always be to delete the file cache. If that doesn't work, delete your personal Configuration folder. Full instructions are in Deleting a corrupted cache file.
If you're having general installation problems, check the installation logs. There's also a dedicated forum for Downloading, Installing, Setup. When posting there, give details of your system and any error messages you get.
Note: Some tutorials are on non-Adobe sites
The Dreamweaver Cookbook contains a collection of articles describing how to perform a range of tasks - some simple, others more advanced - in Dreamweaver. You can also post a request for someone to provide a recipe for a particular task.
North America
Europe, Middle East and Africa
Asia Pacific