Usually the first things to do is to upgrade a few switches, routers etc.
To upgrade them there must be performed a few steps, which depends on your specific vendor, but one thing is everywhere the same - you'll need a TFTP Server to transfer the images to the switch.
Which should you use, which is easy to use etc?
My choice is Tftpd32 - it's easy to install, easy to use and it's opensource :).
After install you'll see an interface like this:
|Screenshot of the Tftp32 interface|
It's avaible for 32- and 64-bit, if it matters.
If you have any questions - feel free to comment.