Press the "F" key a few times to cycle through the different screen modes.
Try different Workspace settings from the drop-down list.
If nothing helps try resetting your preferences as described in the FAQ.
<http://www.adobeforums.com/webx/.ef4a07f/1>
You either have to physically delete (or rename) the preference files or, if using the Alt, Ctrl, and Shift method, be sure that you get a confirmation dialog.
This resets all settings in Photoshop to factory defaults
Do you know if the laptop has the intel grapics media accelerator 950 inside? Reason being is that it only supports opengl 1.4 and shader model 2.0.
CS4 requires opengl 2.0 and shader model 3.0 support to run correctly. Reading what you wrote your system is not up to spec's thus causing the problems.
CS4 requires opengl 2.0 and shader model 3.0 support to run correctly.
That is not true. CS4 requires OpenGL 2.0 and Shader model 3.0 support to utilise the new effects but it should not affect the basic functions that we are talking about here!
Anthony.
Anthony.