You can install Desktop Assistant from either the DOS command line,
or from within Windows.

At the command line, change to the directory where the decompressed
files are, and type SETUP. This will start Windows and proceed with
the installation.

From within Windows, select "Run" from the "File" menu. Type in the
path name where the decompressed files are, followed by SETUP. For
example, if the files are in a directory named C:\MYDIR, type in
C:\MYDIR\SETUP.