The US National Security Agency has given a rare warning about a security vulnerability bug found in Microsoft Windows 10. Almost nearly one billion computers use this software, which means that a glitch has the potential to breakdown damage on a global scale. Explaining the flaw as ‘severe’, the NSA said it gives hackers access to bypass protections & run their own malicious hacking software. Cyber-crooks are ferociously inventive & always on the lookout for new ideas to pinch people’s money, steal their identity or infect their computers & laptops with viruses that perform some other nefarious task.