How to install iPhone OS4 on my iPhone through windows?

I have the file on my desktop iPhone2, 1_4.0_8A293_Restore but a little white Lego block icon I've ever seen and read in one of the websites of developers if you have a Mac you can not access it. Is that why, when I double-click it, open iTunes and nothing happens? Someone to help me here, I have no idea. <3 iPhones forever <3

have iTunes … Connect the iPhone and the CTRL button in Windows when you click Install … select the firmware and get your cup of coffee,,, 14/15 min wait …. ready to use … http://apple-iphone-iphone.blogspot.com/

iOS4 Jailbreak – iPod Touch 2g + iPhone 3G (Redsn0w)

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