As a Yahoo mail user and Yahoo smallbusiness customer I decideed to download and try Zimbra.
It has been uninstalled and never exectuted.
I run Windows Vista. Before that XP since 2000. Prior to that it was 1995 when Microsoft introduced the Program Files directory so that applications did not wind up scattered all over users disks.
When Zimbra advances beyond 1995 and selects the correct directory to install itself. Or even obeys the user selected directory, I will try it again.
Until such time it is where it belongs. In the bit bucket.