Graphics card software free download r9250 256m ddr

your card is the ATI Radeon 9250 256mb similar to one of these?
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

if so then go to the ATI/AMD website:
http://www.amd.com/us/Pages/AMDHomePage.aspx
on the top right coner under "Download Drivers" choose:
"Graphics" for Component Category
choose your operating system
for Product line choose "Radeon"
for Product Model choose "Radeon 9250 series"
then click view results button and that will send you to the most up to date driver that can be run on your computer.