Hi Bbgodfrey, The 'Dell Product Group' team has not tested this system with Windows 8. The drivers may or may not be available in future. You can refer to the link for a compatible system tested by Dell with Windows 8 [URL]  Please reply if you have any questions. 
I recently installed Windows 8 and was told that I should update my ATI driver for RADEON X600.  The current driver is 8.360.0.0, dated 3/14/2007.   Is a better driver available?
Windows 8 driver for Dimension 5150/E510