Xming is an X window server for MS-Windows, which means that it allows you to run graphical applications on Linux systems, that display on your MS-Windows display.
A powerful and easy usable alternative is MobaXterm, which is available on the S-disc. From the MobaXterm website: "MobaXterm is an enhanced terminal for Windows with an X11 server, a tabbed SSH client and several other network tools for remote computing (VNC, RDP, telnet, rlogin). MobaXterm brings all the essential Unix commands to Windows desktop, in a single portable exe file which works out of the box." If you use it professionally, you should consider subscribing to [MobaXterm Professional Edition.