if you want to stop unwanted pop-ups to get entered in your system, then you need to Download popup blocker software on your device. Once it gets enabled, it will become easier to find the virus or malware and it can be blocked instantly.
It is one of the common technical support scams, on phone call they claim themselves to be the technical technician and they found dome alerts and virus warning that need to be removed as soon as possible otherwise it can damage you complete system.
Technical support scammers use their tricks due to which the user gets in fear that the call or warning is true. They also instruct the user to download and install a remote access program, like Team Viewer,Anydesk to share their details with them.