My desktop is a an E Machines T31043 running Windows XP Sp 2, AMD Sempron Processor with 1.80GHz, 1.5 gig RAM. It has an integrated VIA/S3 Unichrom Pro and I installed a ATI Radeon X1850 into the AGP slot. Already went to comp BIOS to changefrom integrated to AGP.

Did you install the video drivers.