Do not click the warning
Do not call the number, pay, download a cleaner or allow notifications.
Try closing the browser tab
Use the tab close button. If the page blocks it, close the whole Browser: The program used to open websites, such as Chrome, Edge, Firefox or Safari. Full definition.
If the browser will not close, use Task Manager
Press Ctrl + Shift + Esc, select the browser and choose End task.
Reopen without restoring the bad page
If asked to restore previous tabs, choose no.
Clear suspicious notification permission
Open browser settings and remove websites you do not recognise from Notifications.
Run a built-in security scan
Use Windows Security or the trusted security tool already installed.
Still stuck?
Social Blade IT Services can help onsite or remotely. We explain the next step before extra work or parts.