If your PC is currently running Windows 8 (or Windows RT) and you want to update to Windows 8.1 (or Windows RT 8.1) in most cases you’ll see this free update prominently featured on the Windows Store home page. If you've opened the Store and you can't see the update, try running the Windows 8.1 Update troubleshooter. This troubleshooter can identify some of the following problems that might be preventing you from updating to Windows 8.1.
Although the Windows 8.1 update is downloaded and installed from the Store, your PC needs Windows updates KB 2871389 and KB 2917499 before Windows 8.1 becomes available to you in the Store.
If you’re using Windows Update to get automatic updates, KB 2871389 and KB 2917499 will be downloaded and installed automatically.
If you’ve turned off automatic updates, if your PC is new and automatic updates haven't been downloaded yet or if you’d rather not wait for Windows Update to do this automatically, you can go to Windows Update and install KB 2871389 and KB 2917499 manually.
Open Windows Update by swiping in from the right edge of the screen (or, if you're using a mouse, pointing to the bottom-right corner of the screen and moving the mouse pointer up), tapping or clicking Settings, tapping or clicking Change PC settings, then tapping or clicking Windows Update.
Tap or click Check for updates now, then wait while Windows looks for the latest updates for your PC. If you don't have automatic installation of important updates turned on, you might need to tap or click Turn on recommended settings before you can check for updates.
If updates are found, tap or click the message telling you how many updates will be installed automatically. In the list of updates, look for one that includes (KB2871389) or (KB2917499) in the name (the exact name will vary depending on your system.).
Tap or click Install to install all the recommended updates in the list.
When the updates have finished, you’ll need to restart your PC. If you have any desktop applications open, save your work and close them before restarting. To restart, swipe in from the right edge of the screen (or, if you're using a mouse, point to the bottom-right corner of the screen and move the mouse pointer up), tap or click Settings, tap or click Power, then tap or click Restart.
After you’ve restarted your PC, on the Start screen, tap or click Store, and you should see the Windows 8.1 update. For more detailed info about installing Windows 8.1, see Updating to Windows 8.1 from Windows 8.
Some editions of Windows 8 don’t support updating to Windows 8.1 from the Store. These include the following:
Windows 8 Enterprise. Talk to your system admin about updating to Windows 8.1.
Windows 8 Pro, if installed by an organisation or a program that uses Volume Licensing. Talk to your system admin, or the administrator of the program that was used to install Windows 8. If you're the administrator, you can find more info and links to Windows 8.1 ISOs in the Windows 8.1 Enterprise Evaluation.
Windows 8 Pro, if installed using an MSDN or TechNet ISO, and activated using Multiple Activation Keys. You might be able to download a Windows 8.1 ISO from MSDN or TechNet.
Windows 8.1 Preview or Windows RT 8.1 Preview. You might still be able to update from the Store. For more information, see Updating from Windows 8.1 Preview to Windows 8.1.
To find out what edition of Windows is on your PC, see Which Windows operating system am I running?
Otherwise, you might be able to perform a clean install of Windows 8.1. For more information, see How to perform a clean installation of Windows.
Swipe in from the right edge of the screen, then tap Search.(If you're using a mouse, point to the top-right corner of the screen, move the mouse pointer down, then click Search.)
Enter run in the search box, then tap or click Run.
Enter wsreset.exe in the Run command, then tap or click OK.
Restart your PC.
On the Start screen, tap or click Store, and check to see if Windows 8.1 now appears on the Store home screen.
For more info about updating to Windows 8.1, see Update to Windows 8.1: FAQ.
See all support pages for installing, upgrading & activating.
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