Reading where you wrote "when I try to update", left me under the impression you were experiencing problems with all the updates. Not just one. Is that the case? Or is it just one update you're having a problem with?
IF it's a problem with all updates .....
You say you "ran detect problem". Did you run Microsoft's Fix It? Automatically reset Windows Update components? IF it is all updates and IF you haven't made use of the tool, I would strongly suggest doing so.
The suggestion in my prior post is only one (of many) areas to investigate. Resetting the winsock was provided in case the problem is caused by a network connection related issue. In hindsight, I should have held off suggesting it, until I had a further understanding of (exactly) what your problem is. And also what you have tried (and ruled out) thus far.
You asked what iPv4 and IPv6 are. The short answer is they're a "set of protocols that computers use to exchange information over the Internet and over home and business networks". IPv6 being the most recent version of IPv4. See IPv6: frequently asked questions. Or for a more detailed explanation of the TCP/IP protocol read IPv6.