What is a terminal and how do I use one in Windows to restore my iPhone?

I am totally new to this so step by steps are useful. This is what I have so far: http://www.funkyspacemonkey.com/downgrade-iphone-os-40-313-mac-windows But that's what makes no sense.

The first message is completely wrong. 1) You need to download the iRecovery, and run with the "Command Prompt" and then just follow the instructions. 2) For previous post, all programs can use the command prompt / terminal – they have to run – I do not know where to get this "restricted" thing.

Windows Server 2008 – Installing Terminal Services

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