During web browsing, an alert "Windows Detected Security Error, Due to Suspicious Activity Found on your Computer. Contact our certified Live Window Technicians 1-888-711-5651 " is displayed on screen. It locks down the screen.
Microsoft safety scanner didn't find thing suspicious.
Can anyone, please suggest and advise me the necessary steps to be taken.
BTW it is windows 8. The message started after I downloaded 'Microsoft Visual Studio'.