is there a link where to get this driver for Windows 8 catalyst driver>
I'm not sure what particular AMD\Ati series you have, but here is a link to the 4000 series
http://support.amd.com/en-us/kb-articles/Pages/ATI-Radeon-4000-Series-Drivers.aspx
You can navigate within the site to find your particular display drivers as I did.
I have 2 Dell XPS notebooks, both with Radeon graphics (different versions), and both defaulted to the Microsoft basic driver.
However, one of them I was able to rollback, but the other is stuck with the basic driver.
I may see if I can copy the working driver files over from one to the other, but as mentioned they're different series, so probably won't work.