Attached Link: http://driverscollection.com/?H=Radeon%20HD%202400&By=ATI

Well doing that you do lose some of the newer features. I would try going back and ***reselect*** “Enable openGL Drawing”, but under the “Advance Settings”, ***deselect*** everything in that dialog box.

Also you said you updated your drivers, but make sure they are the latest ones (which makes a huge difference with Photoshop).

Attached link is for what “looks to me” like the newest drivers for your graphics.

Chuck