When I install the Windows 7 (Home Premium) onboard Intel HD Graphics drivers on an i5 computer it runs slow. When I go from one screen to another it takes about 5 seconds. I have tried two different brand motherboards both with the H55 chipset, 2 different brands of RAM (DDR3 1333). I have seen this on 3 computers.
Have you tested the latest video drivers posted on our site?
If the issue persists, please send a copy of the dxdiag report in your system (Go to start, type dxdiag, press enter and click on save all information)
