These versions of MS Windows have a limit of 64 Kbytes for any .ini file. Serv-U stores all its setup information, including all domains, groups, and users by default in the ServUDaemon.ini file. If the number of domains, users etc. is such that this limit poses a problem you should store domains and their associated groups and users in the computer’s registry rather than the .ini file. Domain storage can be changed in the "Server | Domains | Domain" panel.
Common to all these versions of MS Windows are their rather crippled network abilities, especially on versions after Windows 95. They are very limited in the number of concurrent sockets they can handle (though Windows will normally claim to be able to handle 32000+ concurrent sockets, this has no relation to the actual number of concurrent sockets it will handle). In FTP each connection takes up a socket for sending commands back and forth, plus an additional socket during each data transfer. In practice this means these versions of Windows will reach their limit with just about 2 dozen concurrent FTP users before running out of sockets (which will cause error messages being sent to FTP users when they use any command that needs an additional socket). Keep in mind that sockets are a system-wide shared resource, so if there are other programs on the same PC that use the network the limit for Serv-U will be reached even sooner.
Serv-U can be installed as a service in Windows. This means the Engine will be started automatically each time Windows is started, and it will continue to run even when users log out of Windows and back in again. To install Serv-U as a system service simply check the "Start automatically" checkbox in the "Server" panel. If you need to disable Serv-U as a service under Windows 95/98/ME simply uncheck the "Start automatically" checkbox.
Windows 95/98/ME services are very different from Windows NT and Windows 2000/2003. In these versions of Windows a registry entry is set to start Serv-U when Windows starts up. This registry entry is:
\HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices\Serv-U
To start or stop the Serv-U Engine you can use the adminstrator program or the Tray Icon.