To ensure easy installation on all systems, all the system files are written to the install directory. Nothing is written to your local system directory (e.g., C:\windows\system). If your system directory is on a write-protected network drive, install will work fine, but you may not see the 3d effects (pretty buttons etc.). To correct this, make sure you have ctl3dv2.dll in your windows/system directory (you could copy it from the bin subdirectory of the Mx GUI installation directory, if you can get permission to write these files to thesystem directory).