That and Windows 10 can be upgraded to by an enrollment program, should have seen it in the taskbar. I can't tell of any other way.

See by yourself:
http://imageshack.com/a/img909/4070/my5kzW.png

I don't see anything about automatically upgrading to Windows 10 there. Could you click on "Mas informacion" and "Informacion de soporte tecnico" and link me the pages, so I can see the KB number?

The more information links not show any KB, only goes to the FAQ about the upgrade to W10, but if you take a look in the right pane, you see that is says "Update to Windows 10 Pro - installs the next version of Windows"

The bad here is that is selected by default, so in order to avoid the upgrade, I need to deselect it before installing the other updates.

Apologies, but my Spanish are almost non existent. The fact that it says "installs the next version of Windows" doesn't mean that it is automatically executed. The most likely scenario is that it downloads the files and setup program, then pesters you about installing it.
At least one of the two links should open the Knowledge Base of Microsoft, are you sure neither of the two do so?

Is my fault for not translate what appear in the screenshot, after all, this is a English forum.

The second link goes to Answer Desk (I changed the link to the English one), but once more, not show any relevant info:
https://partner.support.services.microsoft.com/en-us/contact/menu/software/windows/setup/

The files and the setup program are already downloaded by GWX (KB3035583), and yes, it is pesting about installing it, so isn't this. Appear that MS has take a more aggressive way to "convince" users to upgrade to W10.

Said update appears to be a weird one, since it's not listed , though probably because it doesn't exist in a stand alone installer. Best I could find so far does indeed indicate that it is downloaded as part of the [url=https://support.microsoft.com/en-us/kb/3035583]KB3035583 update, and it may have more than one update associated with it.

So, even though I am quite skeptical as to whether it would indeed update without notification, I will accept said possibility, pending further info. My apologies for the tone of the previous posts.

Mira, es una actualización opcional, ellas nunca instalarán automaticamente. Por eso se llama opcionales.

I have windows 10 microsoft just do not seem to think about us retired folks you know we had got so use to the older operating systems like windows xp then you take your computer in for a simple tuneup and next thing you know your signed up for windows 10, and it actually comes home with you because your favourite tech guy recommened it. actually i have no problems with it kinda of like it.

Yesterday I saw the same on my ASUS laptop (Windows 7). I've set it not to automatically download and install any Windows updates (partly so that I don't accidentally run the Win10 upgrade).

Yesterday I manually checked what new updates there are. After it had scanned for them, there was that big banner to update to Windows 10, but I clicked on the "see other updates" link under that.

But as you said, under the optional updates the Win10 update was already selected, while other optional updates were not. So yes, it really does seem to me Microsoft is trying to trick people to accidentally update to Windows 10.

I have no idea if it really goes to install it if you have set up Windows to download and install all relevant (also optional) updates automatically, but at least it seems it would have started the Windows 10 update unless I had specifically deselected the Win10 update before telling it to proceed with the updates.

I really hope this is not true, if it is, fuck you very much MS. Let's see if I'll have to re-install Windows 7 to friend's computer where automatic updates are enabled.

¿Por qué es seleccionada por defecto, mientras que otras actualizaciones opcionales no son? ¿Qué pasa si uno deja como seleccionado, y se va a dejar de descargar e instalar las actualizaciones de Windows? ¿Estás diciendo que no va a hacer eso para que la actualización específica, a pesar de que se ha seleccionado?

¿Y por qué coño estás escribiendo en español de todos modos? Vittu en minäkään kirjoita suomeksi. English, motherfucker, English!

Has anybody tried installing said optional update and seeing what happens exactly? I know you can upgrade from that small little button in the taskbar, but I know nothing about that optional update.

Por qué no? Veo que has descubierto google translate :D

Google Translate FTW! ;P

They are indeed really pushing Windows 10 bigtime. Tonnes of hyperlinks that are in Windows KB articles, in parts of Windows itself etc. that link to things related to older versions of Windows and addons for those have been redirected to the "Upgrade to Windows 10 today" page. Just as one example a link to Windows Defender I just clicked on a Windows 7 laptop took me to a "Upgrade to Windows 10" page. Numerous other links did also, and if you dig around hard enough on the Microsoft website or Google you can actually find the information you're looking for on their site. They've just purposefully chosen to kill various old working links and redirect them to the Windows 10 page to encourage people to see it more and get brainwashed into doing it. :)

That obnoxious Windows systray applet that nags you to upgrade is annoying too and if you uninstall the "critical update" that forcibly installed on the system as if it was a critical security update or similar, it will gladly reinstall itself promptly after unless you take additional steps to disable automatic installation of updates, do a manual update where you get to peruse the updates first, then right click on that particular update and choose hide. However, even if you do that sometimes it will ignore that you told it to hide it and install it anyway.

I'm surprised they haven't just forced Windows 10 to upgrade everyone's Windows 7 mandatory without even giving anyone a choice. They'll probably do that for Windows 11. Well, for people still using Windows by then that is. :)