The U.S. Department of Homeland Security advised computer users to consider using alternatives to Microsoft Corp's Internet Explorer browser until the company fixes a security flaw that hackers have used to launch attacks.
The bug is the first high-profile security flaw to emerge since Microsoft stopped providing security updates for Windows XP earlier this month. That means PCs running the 13-year old operating system could remain unprotected against hackers seeking to exploit the newly uncovered flaw, even after Microsoft figures out how to defend against it.

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