"Can't find WINSOCK.DLL" error in Windows

If you get the error "Can't find WINSOCK.DLL" from Windows as soon as
you try to run the Netscape Navigator, then chances are you don't have
TCP/IP software installed on your system.
When you install TCP/IP networking software on your Windows PC, it
puts a "WINSOCK.DLL" file somewhere in your path (usually in
C:\WINDOWS or C:\WINDOWS\SYSTEM).  This file is the key to letting the
Netscape Navigator connect to other computers across the network.
Without this file, the Netscape Navigator will not work.
Here's a basic explanation of what is needed to run Netscape on a
Windows PC:
First you need a connection to the Internet; either as a direct
Ethernet connection to your PC, or as a SLIP or PPP connection over
your phone line to an Internet Service Provider (ISP).
Next, you need to have TCP/IP software installed on your PC.  There
are many different kinds of TCP/IP software available, and your ISP
should be able to help you decide which to use.
If you do have TCP/IP software installed on your PC but you're still
getting the "Can't find WINSOCK.DLL" error, then make sure that the
WINSOCK.DLL file on your system is in your DOS path (as defined in
your AUTOEXEC.BAT file).  If it is, then try opening a telnet
connection from your PC to another system.  If any of this fails to
work, then you should contact the people who made the networking
software you have; they will be able to help you get it to work.