I Don't Want Windows 10

While we do not argue Microsoft's decision to ensure a quick user adoption for Windows 10 by force-installing a so-called GWX.exe app on your computer's system, we do understand that you might not fully agree with the reasoning behind it.
A quick search on the Internet and you should find helpful tutorials on how to disable the aforementioned app by first removing it from the Task Manager's Start-up section or by uninstalling it using Windows Update.
Appropriately named, I Don't Want Windows 10 is a streamlined uninstaller aimed at beginner users that do not want to manually deactivate the update code-named KB3035583. In other words, the utility basically uninstalls the GWX.exe app and all its related contents from your system with just a few mouse clicks.

An unofficial method for disabling the “Get Windows 10” update

Before you get started, you should know that this is not an official Microsoft-vetted software solution, so caution is advised. In addition, you might also want to turn off the Windows Updates from the Control Panel, as we have discovered during our tests that this is the best option to make the app work.
The process is as straightforward as you would imagine, with you only having to launch the uninstaller and from there let yourself guided by a simple wizard.

Hassle-free solution for getting rid of the KB3035583 update notification

Optionally, you can activate the Advanced Mode, but without actually gaining increased control over the process. In fact, the Advanced Mode only offers you a list of detailed instructions about the files that are removed, therefore making it easy for you to understand the possible repercussions.
At the end of the process, the setup requires you to restart your computer for the changes to take effect. If all went well, at system start-up, you should have a cleaner taskbar without the “Get Windows 10” icon present.

The fastest way to uninstall the “Get Windows 10” system update

All in all, while this may not be the most reliable method of getting rid of the pesky “Get Windows 10” icon (as it might actually find its way back with other small Windows updates), for the moment, it surely is one of the fastest solutions out there.