I got the exact same message just minutes ago . It also has the non stop voice alert saying that I need to call the number before exiting the screen otherwise I will be reported to authorities cause this may "infect other network".
Sounds alarming and threatening. Now, that alone I sensed that this is not legit. Of course, I immediately set my computer to airplane mode to disconnect me to the internet, end all tasks in the task manager and just reboot my computer. I turned back on and
it went away. But even so I called the number (1855.....) just to see what these crooks are up to. First he asked me for the error code which I gave a bunch random numbers. And right away he said that I got this spyware from the last site.. Oh really? I
went to a secured and legit job search website. And then he said in order for him to remove the spyware he needs to get in to my computer and asked for my IP, etc. I was playing dumb the whole time asking bunch of tech questions, what is an IP add, what
is for, etc, etc. Then he went back asking me again for access to my computer. Then I asked him, why should I give it to you.. and he said so he could remove the spyware and "help" me fix the problem. Then I said to him straight.. you are not legit and you
are a scammer. I told him that this toll number (1855...) is not a Microsoft support number. And MS doesn't threaten their customers for not calling the number. He immediately hang up.
UPDATE: I just finish running the MS Safety Scanner and it did not detect any malware, spyware or virus in my computer. I suggest you do the same just to make sure.