On Windows Vista, 3DMark requires Service Pack 2 and the DirectX 11 Platform Update for Windows Vista from Microsoft.
We also recommend installing all recommended Windows Updates, but please note that we no longer support Windows Vista as an OS for using 3DMark.
Also note that AMD has ceased providing driver updates to Windows Vista (Catalyst 13.12 is currently the latest driver for Vista). Without a more recent AMD video driver available for Windows Vista, 3DMark is not guaranteed to work on such system configurations in all situations.