How to get my PC to re-recognize my Microsoft Sidewinder X6 keyboard?

>Well, I am not exactly sure of what you are talking about, I do not know the Sidewinder keyboard or an extension...but it simply sounds like what you have is a short in that connector. Maybe you can use a very fine pair of needlenose pliars and try to bend any bent pins or connectors back into place so that the short doesn't occur any longer. Look into the connector and see if you can see two pins or two metal objects bent or touching each other. That may be the problem right there.