I see some answers related to this question here, but I do not see any that appear to directly address the issue. They are all generic answers that involve OS settings, defrag, pagefile size, etc. The only specific solution, deleting the Dreamweaver cache file, also has no effect on the performance. As others have noted, the problem is VERY SPECIFIC to CS4 under Win 7. CS3 had no such problems. As soon as CS4 is installed the performance is extremely slow, EVERY action, even typing text in the editor, is delayed by a second or two. Has anyone seen a solution to this problem that is specific to CS4 and appears to be effective. I have done searches and find no application specific solutions.