My Laptop configuration is : Dell Inspiron N4050 i5, 4GB ram, 1GB AMD 6470HD Raedon graphics, Windows 7

Many months ago I updated my Graphics driver, then it changed to 7450HD, but thats not the problem.

Today I tried to re install the graphics driver. I uninstalled Catalyst Control Center, Uninstalled any AMD drivers through Driver Fusion, then I did the worst mistake which changed my display to 800x600 resolution : Uninstalled AMD 6470 from the Device Manager.

Now, after that I tried many times to reinstall the driver, only to get the message : 'AMD Drivers were not installed' I had specifically downloaded from Dell website for my graphics number. One thing I did notice, during Catalyst installation, the screen should flicker / go blank, but in my re installation case it didn't.

So, I am stuck with 800x600 resolution. tried a number of times to rectify the error but couldn't. Cleaned registry, made System restore, but still of no use. Any techs here, please help.