http://support.esri.com/index.cfm?fa=knowledgebase.techArticles.articleShow&d=34020
The following ArcGIS 9.2 SP4 products are supported on Windows Vista; ArcReader, ArcView, ArcEditor, ArcInfo Desktop, ArcInfo Workstation, ArcGIS Desktop Extensions, and ArcGIS Engine. Service Pack 4 for ArcGIS 9.2 is required for Windows Vista support. However, there are some serious known issues that users should be aware of issues that users should be aware of before deploying any of these ArcGIS Desktop products on Windows Vista. (Note: ArcGIS Server 9.2-including ArcSDE 9.2, Image Server 9.2, and ArcIMS 9.2 are not supported on Windows Vista)
