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Windows 10’s inquiring minds: How Hello and Cortana get to know you very, very well

Tell Cortana about yourself so she can search better for you. Teach Hello what you look like for instant logins. These services are useful--if you give them your data.

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As PCWorld's senior editor, Mark focuses on Microsoft news and chip technology, among other beats. He has formerly written for PCMag, BYTE, Slashdot, eWEEK, and ReadWrite.

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