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Technology Lab

Major flaw could let lone-wolf hacker bring down huge swaths of Internet

Latest critical bug in widely used DNS server underscores its fragility.

How to do a clean install of Windows 10 (from Windows 7 and 8)

Using your free Windows 10 upgrade key to do a clean install is trickier than expected.

Windows 10 Mail: Beautiful but bug-ridden

Review: Mail, Calendar, and People get an upgrade—and some new frustrations.