Windows 10: My computer is blocked

My computer is blocked. There is a message asking to call Microsoft support at 1-866-240-2582I am not sure this is legit.

:)

 

UAC prompt for Task Manager. MMC blocked. What happened?

It's possible that Computer Management is being blocked by SmartScreen. We suggest disabling it and see if it helps. Follow the steps below:

1. Click the Start button.
2. Type smartscreen in the search bar.
3. Click Change SmartScreen settings.
4. Click the drop-down arrow in the Security row.
5. Click Change settings beneath the WindowsSmartScreen row.
6. Click Don't do anything (turn off Windows SmartScreen).
7. Click OK.

 

Xbox App "Server Connectivity" "Blocked"

Hi,

There are several reasons why the Xbox app server connectivity is blocked. It is possible that
your PC was unable to establish a Teredo IPsec connection to the Quality of Service (QoS) server or your Firewall settings are blocking the connection. To properly isolate your concern, please provide us the following information:

• Is your computer connected to a wired or wireless internet connection?
• Have you made any changes on your computer prior to the issue?
• Are you experiencing the same issue in safe mode with networking? To start Windows in safe mode with networking, you can follow the steps on this
  
  link.

In the meantime, you can perform the suggested solutions on this
link.