Update for Windows 10: Anti-Worm
If you use Windows 10, be sure your system is protected.
If you already set it for automatic update, you're safe. But if you didn't, you're unsafe. The story is here: https://www.garynorth.com/snip/1396.htm
Click on the Start button, then head to Options > Update & Security > Windows Update and click the Check for Updates button.
