Windows 10: Computer locked with Microsoft security alert.

Computer is locked with MicroSoft security alert. I have Chrome OS. I tried control shift escape but nothing happened. It didn't open task manager. The number to call listed as 877 570 7676. Lots of flashing.. and voice encouraging me to not shut down, etc. How do I get out of this? I don't use any Windows

:)

 

Random Auto-Locking of Computer Screen

Nobody suggested checking out Event Viewer? When your computer randomly locks, search for, and open: Event Viewer Under Windows Logs, Check out: • Application • Security, and • System See if you can find something that states anything that could be related to your computer locking. The newest events are listed at the top of each section, so finding an event log would be pretty easy to find. Hopefully we can find what is causing the computer to lock.

 

pop-ups security alerts

Tried everything that was suggested . Still getting security alerts ( even while reading the e-mail from this issue .Also .when I tried to enter command prompt as was suggested on this .

• Right-click on the Start menu.
• Select Command Prompt.
• Type cd/.
• Press Enter.
• Type "C:\Program Files\Internet Explorer\iexplore.exe" -extoff.
• Press Enter.
• This did not go through .I forget the answer it gave ?
• But nothing happened to change the fact I get security alerts ( in all I.E 11 , yahoo.ca.com/ my home page & Facebook ) in fact on any page I open .So annoying .I click esc, it stops and comes right back on my screen .Also tried the internet
  settings suggested on tools .Dated Aug,20.2017. Thank you .

 

Microsoft Security Bulletin for September 2007

Microsoft released yesterday the September Security Bulletin for Windows operating system, as part of its monthly security cycle. This bulletin summary lists one critical and three important updates. For more information, see Microsoft Security Bulletin Summary for September 2007.

Source: Microsoft