Uber Tech Support

I keep getting "notices" which I found out lead to Uber Tech Support which basically freezes my machine.  The only way to get out of it is Ctrl-Alt-Del for Task Manager to quit Internet Explorer.  I called the number Saturday (855-442-7465) and was not nice to them.  I explicitly accused them of trying to take over my machine.  The person who answered the phone - for whom English is NOT his first language - flat out denied it.  I didn't and still don't believe him.  The phone number today is 877-720-7842.

My question:  does AVG protect against these nasty people?  what is necessary to safeguard against this? 

Thank you for your assitance.

Hi Maggie. I'm sorry about the inconvenience caused to you. It appears that you have installed a browser add-on inadvertently. I have sent you an email with the instructions to fix the issue. Please let us know if you need further help. Thanks.

Hi Maggie. I'm sorry about the inconvenience caused to you. It appears that you have installed a browser add-on inadvertently. I have sent you an email with the instructions to fix the issue. Please let us know if you need further help. Thanks.