Microsoft is pushing out a major upgrade to Microsoft account security by offering the option of two-step verification. As of late, many different online services have started to offer two-step or two-factor authentication to help keep online accounts more secure.
Two-step verification usually takes a bit longer to allow access to an account, but it makes it much more difficult for a hacker to brute-force your password. To login after two-step verification is enabled, you'll be required to enter your password and a code that was sent to either an e-mail or cell phone on file.
You'll be able to enable two-step verification at Microsoft's website, though the option might not be immediately available. For more information about Microsoft's two-step implementation, check out their blog post.