Quote:Patch Tuesday was just a week ago, and even those cumulative updates got replaced two days later. Now, it's time for the first round of mid-stream optional cumulative updates.

Today's builds are available for Windows 10 versions 1809, 1803, 1709, and 1607. In other words, it's all supported versions except for the newest and the oldest.

• If you're on version 1809, you'll get KB4541331, bringing the build number to 17763.1131. You can manually download it here
  
• Windows 10 version 1803 is only supported for Enterprise and Education SKUs, but those users will get KB4541333, bringing the build number to 17134.1399. You can manually download it here
  
• Windows 10 version 1709 is also only supported for Enterprise and Education SKUs, and those users will get KB4541330, bringing the build number to 16299.1775. You can manually download it here
  
• Finally, Windows 10 version 1607 is only supported on the Long Term Servicing Channel and for Windows Server 2016, but those users will get KB4541329, bringing the build number to 14393.3595. You can manually download it here
  

As usual, these updates are optional, meaning that you can either install them manually or you can opt into installing them via Windows Update. If you don't, these fixes will be bundled into next month's Patch Tuesday update.