To run the uninstaller, open the Start menu, choose Programs, then Abyss Web Server and select Uninstall. An alternative way is to open the Add/Remove Programs section in the Window's Control Panel, select Abyss Web Server from the dialog's list box and press Install/Uninstall….
Follow the on-screen information to remove Abyss Web Server. The uninstaller may ask you if you wish to completely delete Abyss Web Server's directory. Be careful! If you confirm, it erases the server's configuration file and eventually the hosted web site.