The sneaky Windows 10 update alert is the result of KB3035583 update, a Windows 10 upgrade preparatory package. The update created a new directory in C:\Windows\System32\GWX and installs some executables and files that serve as a notification tool that could display banners and other ads for Windows 10 as the launch date approaches. Meanwhile, the GWXUXWorker.exe file acts as the Windows 10 downloader.
The Windows 10 update notifier behaves according to the phase and how close to the Windows 10 launch is. Digging through the config.xml file reveals the phases that Windows 10 launch could be in, such as None, AnticipationUX, Reservation, Reserved, RTM, GA, UpgradeDetected, UpgradeDownloadInProgress, UpgradeDownloaded, UpgradeReadyToInstall, UpgradeReadySetupInProgress, UpgradeSetupCompatBlock, UpgradeSetupRolledBack, UpgradeSetupFailed, UpgradeSetupComplete and etc.
It’s possible to disable and remove the “Get Windows 10” icon and notification window, by uninstalling KB3035583 update, which was delivered as recommended update to Windows 8.1 Pro, Windows 8.1, and Windows 7 Ultimate, Windows 7 Professional, Windows 7 Home Premium, Windows 7 Home Basic and Windows 7 Starter installed with Service Pack 1 (SP1) early April 2015.
- Open Windows Update by going to Control Panel -> System and Security -> Windows Update, or search for it.
- Click on Installed Updates on the bottom left corner.
- Locate and select the Update for Microsoft Windows (KB3035583) update under Microsoft Windows section. You can search for KB3035583in the search box on top left corner.
- Click on Uninstall to remove the update.
- Click Yes to confirm.
- When uninstallation process is completed, restart the computer.
You’re now free from Get Windows 10 system tray icon and Windows 10 free upgrade offer reservation nag screen. Some people may still have remnants of the KB3035583 update’s files in %WinDir%\System32\GWX folder. In that case just delete the folder (you may need to take ownership of the folder before able to delete it manually).
If you just want to disable the GWX (Get Windows X) app, and keep the update installed, use the Registry Editor (Regedit) to create the following registry key and value. Or, copy and paste the following code into a text file with .reg extension, and then execute it.
In addition to the registry key above, you can also rename the GWXUXWorker.exe and GWX.exe files that are responsible for the nag message (as if they’re deleted). To do so, end and terminate the GWX.exe process using Task Manager. Then, rename the GWXUXWorker.exe and GWX.exe which are located at C:\Windows\System32\GWX folder to another name, such as by appending an suffix likes backup or old. If you prefer, you can delete and remove the entire GWX folder too. Note that you may need to give the system permission’s to respective files if you’re facing with access denied issue.