Windows 10 Cumulative Update KB3135173 Build 10586.104 Available Now

Microsoft today rolled out new Cumulative Update KB3135173 for Windows 10. The update contains bug fixes, security updates, and performance enhancements.

Microsoft today rolled out new Cumulative Update KB3135173 for Windows 10. The update contains bug fixes, security updates, and performance enhancements. It also brings the previous Build 10586.71 all the way up to Build10586.104. Here’s a look at installing the update and what you can expect.

Windows 10 Update KB3132723

Windows 10 Cumulative Update KB3135173

There aren’t any noticeable changes to the UI in this update, everything that’s included in this update is under the hood bug fixes to enhance the functionality of Windows 10.

According to Microsoft’s new Windows 10 Update History page this update addresses the following:

This update includes quality improvements and security fixes. No new operating system features are being introduced this month. Key changes in this update include:

  • Fixed issues with authentication, update installation, and operating system installation.
  • Fixed issue with Microsoft Edge browser caching visited URLs while using InPrivate browsing.
  • Fixed issue that didn’t allow simultaneous install of apps from the Windows Store and updates from Windows Update.
  • Fixed issue that delayed the availability of songs added to the Groove Music app in Windows 10 Mobile.
  • Improved security in the Windows kernel.
  • Fixed security issues that could allow remote code execution when malware is run on a target system.
  • Fixed security issues in Microsoft Edge and Internet Explorer 11 that could allow code from a malicious website to be installed and run on a device.
  • Fixed additional issues with the Windows UX, Windows 10 Mobile, Internet Explorer 11, Microsoft Edge, and taskbar.
  • Fixed additional security issues with .NET Framework, Windows Journal, Active Directory Federation Services, NPS Radius Server, kernel-mode drivers, and WebDAV.

For more info about the security fixes in this update and a complete list of affected files, see KB3135173.

Finishing the Update

You’ll get this latest update automatically at some point, but if you don’t want to wait, you can grab it manually by going to Settings > Update & Security > Windows Update.

You also will need to reboot your PC to complete the update process. But you can always schedule the restart for a time that works best for you. For more on that, read our guide on how to schedule Windows 10 Update restarts.

Restart Required

After the update process has completed, you can check out the new build number by launching the hidden quick access menu and selecting Run or by hitting Windows key + R and then type: winver and hit Enter.

There you can see that your Windows 10 build number has jumped up a bit.

Version 1511 Build 10586.104

After you get this latest Cumulative update installed, let us know how things are running on your Windows 10 system in our comment section below. If something is not working correctly and you need more help, hop into our free Windows 10 Forums for more discussion and help.



  1. Ziggy

    February 9, 2016 at 5:01 pm

    Just received this (and other updates) this morning, Australian time. All good, no hiccups to this point of time. Installed successfully on both my laptop and pc. It will be interesting to read comments here to see how others fared. These cumulative updates are great when they work, but a nightmare when they go wrong!

  2. Chittesh

    February 10, 2016 at 7:08 am

    It breaks IE 11
    (Windows Modal Dialog will stop returning value…And boom..!!!!)

    Really waiting for MSFT to fix this soonest.

  3. jeff hobson

    February 10, 2016 at 11:45 am

    Every update causes the “network’ listing under ‘MY PC’ to lose the list of the network disks (NAS). It takes a fair amount of time to re-establish that listng; sometimes I am not able to get it back and need to wait until some other update restores that listing. The disks are there and accessable but they are just not listed. Something in the update process is turning off some service that needs to be running to get that listing

  4. Wirez12

    February 13, 2016 at 1:39 am

    Windows installed this on its own (like usual). Now I cannot access the start menu and a few programs on my taskbar are blanked out and not accessible. Looking like linux is more and more the answer everyday. SMH.

  5. SZ123

    February 14, 2016 at 4:54 pm

    Same issue as Wirez12 – start menu killed, info center killed, calc killed :-(

  6. Synn

    February 23, 2016 at 7:08 am

    Same issue as Wirez12 and SZ123. Start Menu, Action Center all fail to launch

  7. David Soussan

    February 26, 2016 at 4:13 am

    Won’t download or install here – stuck at “Downloading Updates 3%” and I hit Details I see:

    Cumulative Update for Windows 10 Version 1511 for x64-based Systems (KB3135173)
    Waiting for download

    The Windows Update Troubleshooter says “Troubleshooting couldn’t identify the problem”

    Did MS pull the update and not tell anyone?

  8. Ziggy

    February 26, 2016 at 7:22 pm

    @David: You might want to check the link provided below as it gives the direct download links for 64 bit and 32 bit KB3135173.

    As always check the download with your a/v. I’ve used these direct download links in the past and have had no problems with them. Note, the downloads can be largish in size.

  9. Bob R

    March 8, 2016 at 5:23 pm

    Locked my pc in an “orange screen of death” (orange screen w/circling dots for hours). Restored OS to date prior to update and everything worked fine. Then Microsoft forced the update again and same thing happened. I’m restoring a second time, but this is bulls&@$! Microsoft needs to put some user controls back into the update process if they’re going to deliver half-baked code.

  10. Ferdinand Rios

    May 3, 2016 at 8:35 am

    This broke my network connection to QuickBooks, saying it might be a firewall issue even though the firewall is turned off.

  11. Brenda White

    June 22, 2016 at 9:58 am

    Broke my browsers….can ping websites, browsers won’t work….so frustrated.

    • Ziggy

      June 22, 2016 at 6:43 pm

      @Brenda: What browsers are you specifically talking about? Both Chrome and Firefox have a feature where you can “refresh” the browsers.

      For Firefox check this link

      For Chrome check this link

      For Microsoft Edge check this link

      In relation Microsoft Edge I would be careful in using powershell scripts as they can mess things up.

      Whatever you do create a system restore point first. If you don’t use edge skip the information from the link provided.

      If worse comes to worse you may have to re-upgrade your pc/laptop. I’ve gone through this procedure and it’s pretty much a clean re-install by using the Microsoft Media creation tool. What it boils down to is upgrading an upgrade which, I know, sounds a bit silly.

      This re-upgrade method fixed problems with Store Apps on my laptop, which could not be fixed in any other way! However, it does take some considerable time to complete. Good luck!

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