Legacy Update: Get back online, activate, and install updates on your legacy Windows PC

Happy 10th release! 🎉

Legacy Update 1.10 comes packed with numerous improvements to celebrate our 10th major version.

• Setup is faster than ever: Many improvements have been made to the initial Legacy Update setup tool.
  • If a restart is required to install Service Packs, Servicing Stacks, and other updates, your system will enter “setup mode”. You’ll see Legacy Update reappear immediately after the Windows splash screen. This makes the process go by faster, and fixes issues with the previous method we used, such as the computer automatically locking itself while logged into the LegacyUpdateTemp user.
  • Installing updates on Windows Vista and later better avoid Windows Update’s high CPU usage issues.
  • Installation of Windows XP Service Pack 3 on top of RTM is now faster, using the smaller SP1a rather than SP2, and avoiding an additional restart.
• Windows 2000:
  • Internet Explorer 6 setup now downloads all of its required files before restarting your computer. This can help when internet isn’t connected immediately on startup (e.g. with Wi-Fi or dial-up).
  • Possibly fixes “No mapping between account names and security IDs was done.” error when running Legacy Update on the first boot after installing Service Pack 4.
• Windows 7:
  • Fixes some required updates being skipped on Windows 7 installations that have already been partially updated.
  • Fixes a required update failing to install on Windows 7.
• Windows 8:
  • As Microsoft removed the Windows 8.1 download from their website in June 2024, the feature to upgrade Windows 8 to 8.1 has been removed. You’ll need to perform this upgrade manually.
• Windows 10 and 11:
  • When clicking the Restart button on the website, Legacy Update now ensures the system is aware that you’re requesting to “update and restart”. Previously, this may have triggered a regular restart without installing updates.
  • Windows 10 changes the way Windows Update logs work, requiring a PowerShell cmdlet to be executed to convert event logs to a text file. When clicking “View Log File” on the website, the log will be automatically generated and opened for you.
• New:
  • Adds a nicer Windows Aero-style look in Legacy Update setup under Windows Vista and later.
  • Legacy Update setup now looks for unsupported configurations, such as running on a beta release of Windows, or using Compatibility Mode on the setup executable. Updates tend to not work correctly in these cases, and could damage your Windows installation.
  • Legacy Update now has a “launcher” executable. This should bring no noticeable difference for the majority of users, but it may be more convenient to those using custom shortcuts/scripts to launch Legacy Update. The rundll32 method is now deprecated, but will continue to work.
  • Adds a /passive flag to the setup, skipping all user input and automatically installing with the default options.
• Fixes:
  • Fixes setup failing to run on 486, Pentium, and Cyrix systems (CPUs lacking SSE instructions).
  • Fixes Windows Update’s installation progress dialog appearing blurry on systems using display scaling, and appearing behind the Internet Explorer window.
  • General cleanup, some file size reduction, and other small improvements.

A big thanks to @renodr for his awesome contributions to this release, including fixing some bugs, and helping to set up continuous integration (CI) tests on GitHub Actions, which allows us to provide nightly builds.

Thanks for using Legacy Update! I’m currently looking at acquiring Windows Phone, Surface, and maybe even Windows Mixed Reality hardware to review what Legacy Update can do to improve these discontinued products, so your support is always appreciated.

• Legacy Update can now update itself when you use it. If you already have Legacy Update installed, just visit the website in Internet Explorer to update to 1.9!
• Adds support for installing Service Pack 3 of the original 2001 edition of Windows XP Embedded. (Contributed by @renodr - thanks!)
• Adds support for installing Update Rollup 4 of Windows Home Server 2011. (Contributed by @renodr and @stdin82 - thanks!)
• Fixes Legacy Update setup crashing when it attempts to enable Microsoft Update on Windows 7.
• Fixes Certificate Trust List being unnecessarily redownloaded after Legacy Update restarts the computer.
• General internal cleanup of the Legacy Update setup code.

• Legacy Update is now signed, so you won’t see any more scary warnings about “program from an unknown publisher” or similar.
  Code signing certificates are expensive - this cost me $340 USD. I was only able to do this thanks to those who generously support the project on GitHub Sponsors and Patreon.
• Legacy Update can now be directly accessed from a regular, non-administrator instance of Internet Explorer on Windows Vista and later. This also means you can use Legacy Update via Internet Explorer Mode in Microsoft Edge.
• Provides better messaging when Internet Explorer has been uninstalled (such as in “E” editions of Windows).
• Fixes Legacy Update setup unnecessarily redownloading updates that are already installed.
• Fixes an error when attempting to uninstall Legacy Update from the Control Panel.
• Hopefully fixes the “Enable Microsoft Update” option in Legacy Update setup not working on Windows 7.

• Fixes error 80072EFE reappearing on Windows 7. The installation of the 2016-03 Servicing Stack Update was unintentionally removed in Legacy Update 1.7, which is the update that contains the fix for this error. (Contributed by @renodr - thanks!)
• Fixes an issue where “Preparing your desktop…” could appear indefinitely after Legacy Update restarts the system, due to an “Open File - Security Warning” dialog hiding behind the message.
• Fixes the setup process failing at the root certificates store update step due to an “Open SrcStore failed => 0x2 (2)” error message.