First, go to http://support.amd.com/us/gpudownload/Pages/index.aspx
and download drivers, save them to desktop.
Go to Add/remove programs/program manager and delete all ATI drivers/software.
Reboot, install the downloaded drivers. Select "custom install", or else it will install a bunch of crud. Install drivers and CCC. Reboot.
If it is still acting up, go into task manager and see what the CPU use is while on the internet. I have seen some older systems choke with IE8 and flash animations when too many background programs are chewing up CPU time.
Never use the driver disk for video cards as ATI releases new drivers every month, especially for the 5XXX series. I will likely end up getting a 5670 for my new HTPC build in a few weeks. Let us know how it works (if you are running Blu Ray through the
HDMI port on it, really let me know).
I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)
3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)