Illustrator CS5 'unknown error'

Question

Hello,
I am running a legit copy of Adobe Master Suite CS5 and I'm running into some very strange issues in Illustrator. If I'm working on a file (something simple usually - maybe a couple simple polygons), everything can be working fine. Suddenly, if I try to drag an object I can't do anything. It's like the object is attached to an elastic and it goes back to it's original position no matter where I try to place it. I also can't use keyboard shortcuts to copy/paste/duplicate, etc., but regular buttons and menus will work. When this is happening, if I try to save I get an 'unknown error' message, and even if the file is previously versioned in CS5, illustrator will try to create a CS4 copy and still give me the 'unknown error' message. It's all very strange.
If I leave the computer long enough the error sometimes fixes itself and the file becomes usable. Otherwise I lose all my work.
Any suggestions of what can be causing this? I've recently installed this on a new Windows 7 computer (no previous windows or adobe versions have been running on this system). I was also running CS5 on my older system which previously had CS4 and Windows XP, and the error has occured on both systems.
Any help would be greatly appreciated.

Answer 1

Either a permissions problem or, which is more likely, a driver problem with you screen vs. your input device (mouse, tablet) where your mosue is operating on invalid screren coordinates and certain operations would appear as if happening outside the program window. Could also be some external tool, of course, like some security program doing file scans and in the process locking your work files or temp files and consuming all harddrive bandwidth...
Mylenium