In fact, if you've come this far and not yet upgraded, then I congratulate you on your grit and determination. If you've been actively using your Windows installation on your Mac, and you've been keeping up with the updates, then chances are high that you've been reminded, then reminded again, then pestered, cajoled, and then hassled to upgrade already. Windows 10 is a security disaster waiting to happen.Microsoft releases fix for patch that broke VPNs and more.Here's how you can still get a free Windows 10 upgrade.Microsoft's auto-upgrading more PCs to Windows 10 21H2, so get ready.