I have a problem with Blender on my new computer!
There is lag when I select a mash or choose shading button or select whatever else in blender!
My video card is Ati X200 integred into the mainboard!
Its the ATI card.
Try turning off hardware acceleration either with a control panel or by placing a fake atioglxx.dll in the blender installation directory (I just took one of the default .dlls provided by blender and renamed it atioglxx.dll).
You also might try looking at Omega Drivers.
Everything is now ok! Thanks a lot!!!