NOTES CLIENT INSTALLATION AND UPGRADE
Note If a Notes version is currently installed, the default path is the current Notes installation path. When you install Notes single user on a system on which Notes 6.5 or 7.x is already installed, the traditional Notes portion of the product is upgraded and installed to the same directory in which the existing Notes install binaries currently reside, for example C:\Lotus\Notes. The Notes data directory is assumed to be the directory where the existing Notes install data files exist, for example C:\Lotus\Notes\data. Additional IBM® Lotus® Expeditor framework files are installed to a \framework subdirectory, for example C:\Lotus\Notes\framework.
The default and suggested Windows Vista™ and Windows XP single user directories for Notes install are as below: