If your Win10 machine did not go beep in the night, you might want to get on that reboot as there are numerous security patches waiting to install.  One of them is a long standing flaw which effects those who haven't disembowelled the Cortana search assistant on their computer.  For those that have managed to subdue Cortana, rest assured she is not listening to you at all times; those who haven't should be aware that she is always listening, even in her sleep.  As creepy as that already is, it has also been a way to take advantage of long standing security flaw in the assistant.   This, as well as a patch for a Spectre variant and a variety of other patches is waiting your installation. 

You can check out information on Cortana's bad habits over at The Inquirer.

"Lane Thames, a senior security researcher at Tripwire, spoke out about the long-standing flaw with Cortana, that meant the AI helper was always listening for commands, even when a PC is locked."

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