In computing, hardware acceleration is the use of hardware to perform some function faster than is possible in software running on the general purpose.
IE9 has another cool new feature named Hardware Acceleration which uses the full graphic power of your computer and renders the page in IE9 as fast as possible. This feature could prove heavy for usage, which might affect other processes and graphic related processing, you may like to disable it.
Follow the procedure below to disable it
1. Run Internet Explorer 9
2. Go to Internet Options as shown in the image below.
3. Click Advanced tab under internet options and check the option which says use software rendering instead of GPU rendering as shown in the image below.
4. Click ok to save the settings, you will need to restart your browser changes to take place on IE9
Note: Uncheck the same check box any time, to enable hardware acceleration again.