I normally do not accept these alerts, but this one is real.
Big Hat Tip to Israel Matzav
According to Israel Matzav wife's boss, who is very up on these things (because she has to be), this one is for real.
If your computer is not using a rogue DNS service, you will be done with this less than a minute after you click the link. If you are using a rogue DNS service, it will take you much longer, but it beats the alternative of not being able to surf the internet after July 9.
I did this for my computer, it took only a few minutes and everything checked out. Do it before July 9th.