Nancy O this doesn't solve the problem either yet Adobe Dw CS6 still spikes my one out of four core to 80 to 100% .
I have done all prefrence deleting ,cache cleaning, registry editing which are posted in this forum but all these have no impact to Dreamwever.
I don't know why Adobe just release a patch and fix this issue because people buy these products so the "Company" should have a responsibility to fix these issues.
I solved that issue for Dreamweaver CS5!
Somehow the main window message handler of the consumes very much CPU power. In detail the mfc90u.dll!#6019 part that uses USER32.PeekMessageW.
Here is the patch:
I guess things in DW CS6 are still the same.
Well to get this patch applied the first issue will be to find the right mfc90u.dll inside the windows side-by-side mess
Next issue might be to fight for ya right to write.
Important: Please give some feedback if you got this also working for CS6.
... and the path to mfc90u.dll for CS6 like for example:
Sorry, but this is not fixed in my experience. I have version 184.108.40.20661 (fully updated as of today), and Dreamweaver is taking 100% CPU - not just at startup, but much of the time. I am having to fully force quit and restart Dreamweaver and my Mac many times each week (often multiple times/day).
I'll look for answers in other threads.
I gave up on Dreamweaver after trying many times to resolve this problem, searching forums etc.
Found the update of this post and got my hopes up. Hoped the update (12.0.3) would fix the problem.
Been trying for two days to update Dreamweaver CS6 via Adobe Application Manager.
All I see is: "The update server is not responding. The server might be offline temporarily, or the Internet or firewall settings may be incorrect." Even with the anti-virus and firewall turned off.
As mentioned in my earlier post, this issue was fixed with Dreamweaver update 12.1 and 12.0.3 (for perpetual license holders). I am not sure if you can update trial versions, but just in case you can, the updaters are here http://www.adobe.com/support/dreamweaver/downloads_updaters.html
I am using Creative Cloud, Dreamweaver CS6, Version 12.2 Build 6006.
Dw uses ~50% of CPU when on idle, so it seems to me that the problem has not ben solved properly.
This is a rather annoying bug, because it slows down the whole system (quadcore, 8gb, win7 64bit) what makes working a pain...