Hi everyone am HarTar, and I'm just a beginner who is interested in the Jtag, surely it's a great thing, but what exactly is a Jtag? And what happens if I installed a program - like XeXmenu - into my XBox 360? Would it not run again? And how to fix it if that happened?
And if I have a new update which would prevent me from installing the Jtag or the Xexmenu, is it possible to roll-back the XBox 360 update? or to install\return the old Blade Dashboard?

Thank you for your time reading this post.

Note: Writing this post I wanted to help the comunnity of beginner people, who are new to the idea of the Jtag, and me - as a beginner - to get answers to the basic problems that I or any one would fall into before we fall into.