I have a 27 inch iMac with the ATI Radeon 4850 video card. For some reason I cannot update the driver to the latest 10.1 version. I download the driver from the ATI site, then run setup which then brings me to the ATI installer, I run that but after it is finished, nothing, I check under device manager and the old driver is still there. This is all on Windows 7 32 bit. I'm wondering if anyone else is having the same trouble.