Before you do anything, have you checked that you have the correct
amount of RAM in your system (you need at least 1 GB). I had the same
very problem when I wanted to install the trial version on my 512 MB
machine and it locked and you don't get anything messages on the screen
about system requirements etc. When I tried the same download on my
home desktop which has 2 GB ram, it installed quickly and it was running
fine. The trial period has expired so I can't use it anymore but in any
case I won't be buying it because I don't like it at all. I will stay
with EW2 for the time being because I like its CSS stuff. I do all the
coding manually but use EW2 to get my CSS attributes. Most of the time
I am working in CODE view anyway so that I can manually change the html
stuff.
hth