You don't play your game with your ATI Mobility Radeon HD 5470 graphics card, therefore the glitch.
But i think you use the Intel HD instead...(that's exact the graphic glitch with an Intel HD video adapter, as i saw on that video !!!!)
Go to your Control panel-> Device Manager-> Display Adapters
If two Display adapters are present, switchable graphics are supported.
If there is only one Display adapter listed, the computer does not support switchable graphics.
(But i don't think this will be the case here...)
"The Radeon chip also comes with manual graphics switching technology."
When you install a game you must go into the "Catalyst Control Center" by right-clicking on the desktop and selecting "Configure Switchable Graphics."
While in the control center you can select from a list of programs for which you want the graphics card on (as opposed to the integrated graphics chipset)"
How To Switch Between intel Graphic Card And AMD Radeon Graphic Card For Hp
http://www.youtube.com/watch?v=P_nT976HDRo
So, switching from Power Saving to High Performance you actually with play your game with your Ati instead with your Intel HD
graphics card.
...and tell my if you have problems with that. !!!!!