Though, I have to say, its only helped me when I have had a huge ammount of stuff on my pc and defrag hadn't been run for a very long time.
The useage reported shouldn't slow the editor to a crawl though.
Strange one really. the suggestion of doing a drive reformat being the bizzarest one yet! Fine as long as you don't have anything else in there you don't mind losing.
The other programs you have, are they 'normal' or ram intensive, the antivirus ones now can be doing all sorts of stuff in the background, could the editor be getting some 'special' treatment maybe, that could slow it down. Check the antivirus program hasnt had changes made to how it treats individual programs...
Still, this is something that seems to have just 'appeared' out of the blue, could you do an uninstall, shut down and unplug, then restart use the pc and verify that everything else is running as it should ie normally, then reinstall the editor.
Hopefully it will get sorted
Ps, I am using Windows 7 64 bit and have Norton antivirus running, the internet and email is active and two other programs are loaded. The CoffeeCup Editor loads in 2 seconds flat.....
With no files to auto open.