Online users who are unable to close the pop-up message scam can use Task Manager to close their web browser. This is because the pop-up message is generated via your web browser and it doesn't mean that your computer is infected with a virus or other malware.
The "Your ISP Has Blocked Your PC" Scam
YOUR ISP HAS BLOCKED YOUR PC
Error a 268D3
Call Microsoft immediately at: +1-888-876-8163
Do not ignore this critical alert.
If you close this page. your PC access will be disabled to prevent further damage to our network.
Your PC has alerted us that It has been infected with a virus and spyware. The following information is being stolen...
> Credit Card Details
> Your ISO Account Login
> Photos stored on this PC.
You must contact us immediately so that our engineers tan walk you through the removal process over the phone. Please call Microsoft within the next 5 minutes to prevent your PC from being disabled.
Call Microsoft: +1-888-876-8163