The second Tuesday of every month is Update Tuesday. It's the day Microsoft releases its regular security and performance updates for Windows, Internet Explorer, Office and other Microsoft programs.
For the March Update Tuesday, Microsoft has released 13 updates and five of them are rated as "Critical." They fix security flaws in Internet Explorer, Microsoft Edge, Windows Media, Windows PDF Library, and how Windows handles graphic fonts. Using these flaws a hacker could run malicious code on your computer, and you can expect to see attacks using these flaws very soon.
The other 8 updates, rated "Important," fix problems in Windows, Microsoft Office and .NET that could lead to remote code execution, elevation of privilege and security feature bypassing. While they'll be harder for hackers to use, you'll still want to make sure the updates are installed.
If you have Windows set to automatically update, or you're running Windows 10, it should have updated all ready, or told you that you need to restart to update. Find out how to turn on automatic updating to make sure you don't miss anything important.
If you want to verify that the updates are installed, go to Control Panel>>System & Security and in the Windows Update section click "View installed updates." Look for the date March 8, and the update numbers KB3142015, KB3142019, KB3140709, KB3143148, KB3143146, KB3143081, KB3141806, KB3143136, KB3140410, KB3143141, KB3143142, KB3143145, KB3141780. Just note that you might not have all of these updates, depending on your version of Windows and which features are installed.
Keeping Windows and your other programs up to date is an important step to keeping hackers out of your computer. Strong security software is another critical piece of the protection puzzle.