The Windows 10 Technical Preview has
come a long way over the last nine months or so, but there's still
plenty left to iron out before the next generation of Windows is
humming along on our PCs, tablets and phones. The
end is in sight: Windows 10 will be released on July 29 as a free
download for anyone running Windows 7 , Windows 8, or Windows 8.1;
the free update will be available for a year.