Graphics driver is not working properly after Update!

Hi, I have a Dell studio 15 laptop with Windows 7 Home Premium(64-bit),intel i3 processor, 4GB RAM and 1GB Graphic card(AMD RADON), About 2 months ago,i had updated my graphics driver from Dell. After the Update my computer started to have errors like shut down without warning, Display not responding and sometimes a blue screen appears. So I downloaded the recommended driver directly from AMD website and also installed it. But the problem is not solved. Yesterday when i tried to open the 'Catalyst(TM) Control Center', It showed an error shown below

So I tried opening it  once again and this time it showed a different warning box.

So i tried to download the driver again from Dell and that shows an error too

So can anyone help me in sorting out this problem?