Hi

Whilst running Dreamweaver can you check the processes and performance monitor in the windows task manager, (press ctrl/Alt/del to open), and how much the performance monitor is showing for the memory in use, (with and without Dreamweaver running).

PZ

Ok did a little searching and got pointed to a bug in Windows Vista/7 because of how it handles 64-bit vs 32-bit applications.  I cannot guarantee that the below will work, but it's worth a read-through and a possible shot.

There's something called the Desktop Heap Limitation that was put into Windows Vista/7 64-bit for 32-bit apps.  Basically the desktop heap is filling up and Windows is triggering the Out of Memory error in DW because all allocated memory to that heap has been used up.  That's the short of it.  For the in-depth read, if you are interested, here's the MSDN post:

http://blogs.msdn.com/b/ntdebugging/archive/2007/01/04/desktop-heap-ov erview.aspx

The good news is, Windows wrote a patch to overwrite this issue, but they hope it works so it was never provided as a distributed patch.  The bad news is it is editing the registry, so you should use caution and always make backups in case you need to restore before making these changes.  The patch can be found at:

http://support.microsoft.com/kb/947246

In theory, this patch from MS should cure the DW issue you are experiencing, although I will admit I have never used it before for any app on Windows (Mac is my primary platform but I occassionally use Windows).  So it's a use at your own risk type of feature.  As long as you backup the registry before executing I think you should be fine.  That way you can restore it if it doesn't work out and nothing is lost.

I can try to keep looking further, but right now that's where my search has been pointing me.