It is hard to tell the cause of this behavior without information about your system or whether some code is running.
Here are the plausible causes:
- Low on-system RAM
- Loading some data or executing commands in 'startup.m'. You could rule out this possibility by checking if you have any commands in your 'startup' file. To open this file, execute the following command in MATLAB Command Window:
>> edit startup
- Interaction with graphics card. Certain graphics card and drivers have been known to cause this issue. If it is a graphics issue, you can switch to 'softwareopengl' to resolve this. If you have figured out this is indeed a graphics card issue, the best idea would be to update your driver to latest version (or roll it back to previous version if you have the most updated one.)
- Certain users have reported performance issues on Windows 7, when they have set up "Aero" theme. If you are using this windows theme, consider changing it to see if it resolves the issue.
- Run a benchmark by typing "bench" in the command window. It will show the performance of some standard algorithms on your computer.
If you are still facing issue, you can contact The MathWorks' Technical Support team by creating a new help ticket: http://www.mathworks.com/support/servicerequests/create.html
