You could try to reinstall the graphics driver or disable "igfxtray" from MSCONFIG, startup items.
I would need more information in regards to your system configuration:
Which version of Windows do you have?
Also, the exact processor model and the graphics controller:
http://www.intel.com/support/graphics/sb/CS-009482.htm Graphics Drivers — How to Identify Your Intel® Graphics Controller
Click the Windows icon, and then right-click Computer .
Select Properties .
Find System Type on the Properties window, and then note the processor model.
Allan.
