ouch, 6200 is barely worth the upgrade if you ask me. you should be able to run a 6600GT or Radeon X600 or X800 with a 350-450w PSU
You know, the computer in question may have never shipped with Windows 7. That brings the question forward, "where did the "Windows 7" drivers come from?Drivers updated. Windows 7 update - then video card needs to be upgraded.