Windows 7: AMD catalyst driver doesnt update

Hi... my graphics card is Mobility radeon HD5145 ..whenever i update my driver only the catalyst control center updates .. but the core driver is stuck at 10.8 .. can anyone help me with this ..

Because there is no support for yours in the driver. From the release notes for the Catalyst 11.2,

AMD Catalyst

Toshiba is one of the few that won't allow for the reference AMD drivers to be installed (same would apply if it had a Nvidia card in it as well).

One reason for that is if yours has the switchable graphics as mentioned in the above, which with yours having the i3 330M in it is likely. If it does in a lot of cases if the reference driver can be installed the switching won't work and requires both the AMD (or Nvidia if equipped) and Intel graphics drivers to be installed, and only the ones from the laptop manufacturer have been made to work with it.

Do a complete uninstall of CCC, also remembering to remove the Drivers that Windows will install.

right click on the screen.
Select screen resolution
Click advance settings
Should open another window. On the Adapter meun, which should be the first menu it opens, click properties.
This will open another window, selece the driver tab along the top of the window.
Now click the 5th button unistall.
Once done, restart the system and install the new CCC

HTH

will it be wise to uninstall the driver which came with my laptop and install a newer one ??

Once everything is uninstalled run Driver sweeper (See my sig for link information), then install the new drivers.