I've searched the archives, and discovered that this question has been asked before but never answered: How does one install OTRS if Apache (and other prerequisites) are already installed? There's one note that's a couple of years old that claims it's not a problem, but when I run the 2.1.1 Windows installer, I get "Found the installed service Apache2. Installation aborted. Please remove the services Apache, MySQL, Perl, and Cron before continuing." Obviously, removing such services is unacceptable, since the reason they're there is that other systems on the server rely on them. Do the OTRS developers consider this a bug in the installer? My opinion is yes; an installation kit could choose to require them as prerequisites, but it should never prohibit existing installations, and nor should it try to install them itself without going through the native installers for the various products. Thanks, Gary