GEO-SLOPE Office has been tested and will run on Windows Vista. You must however have the proper folder permissions where your project files are stored to avoid the error displayed in Knowledge Base article KB704.
GeoStudio 2007 will provide the best experience on Windows Vista. It has received the "Certified for Windows Vista" logo from Microsoft, indicating that it installs reliably, runs securely, and performs well on both 32-bit and 64-bit editions of Windows Vista.
See Also:
KB746: Windows 7 Support for GEO-SLOPE Office 5
KB700: Windows Vista Support for GeoStudio
KB701: Windows Vista Support for Seep3D