Windows 10: virus alert

I have received a notice that my computer is blocked because of a virus threat. I have been told to call 877-761-9099. Is this a valid number? If not, how should I proceed

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virus alert

defender finds a virus, quarantined the virus. I remove all the quarantined viruses. the threat alert pm the bottom right of the screen slices over with the same virus alert. I remove the quarantined virus.. the alert alerts again. this keeps repeating.
the virus is "Bruser modifier Win 32/Polteci

<Moved from Insider>

 

Emergency Alerts

Hi Stephanie,

Just to confirm, is this the same thing that you tried on your phone, in order to turn off Amber Alerts?

• Open Settings.
• Tap on System.
• Tap on Messaging.
• Tap on the Change emergency alert settings link.
• Turn on or off the emergency alerts you want.

Let us know if this was the same thing that you tried.

We would also suggest to reset your phone after doing these steps to ensure that the changes on your phone's settings will be refreshed.

Simply press and hold the Power and Volume down button for 15 seconds and then release your hold afterwards.

 

Virus alert from microsoft edge

Hello jodemo,

The alert you received about virus is a common scam. We suggest that you close Microsoft Edge immediately. Make sure not to restore the sessions when you reopen Microsoft Edge.

In addition, we highly recommend you to follow the steps provided by Bruce Hagen MVP on this
thread link.

Hope this information helps you. Feel free to post back if you need further assistance.