As far as I'm aware Macromedia's products are all processor intensive. While I have no experience with Dreamweaver itself, Flash and Acrobat are resource hogs.
I would suspect this is a problem with Macromedia and not your system.
A CPU is given tasks to perform continuously If you open up the Task Manager and select the process tab you can see all the tasks the CPU has to perform. A sophisticated processor will work one request and then move on to another a Dual core processor is capable of performing 2 tasks simultaneously.
Which leads to the question of, how many processes is your system running?
and What RAM (model) does the system have?
I would suggest that the processes that are not needed be ended in order to facilitate a faster task switching process.
might be of some use. Wrong version but principle is the same, also don't follow suggestion #2.