Oh, god help us !

This does not make any sense. There is no such thing as a Windows 11 and there will not be for years to come. Windows 10 is delivered as a service, meaning that it will be upgraded through a continuous stream of updates. Just like OS X and most other operating systems today. Some areas of Sweden would classify these systems as "incomplete systems, made by fools".

Current version of Windows 10 is 1511 (November 2015). The next major update will be around June 2016 (code name Redstone), but it will be an update and not an upgrade. Currently, until June 2016, every user of Windows 7, Windows 8 or Windows 8.1 can upgrade to Windows 10 for free. I encourage everyone who qualifies to do so, because earlier versions of Windows will not be supported forever and will stop getting security patches. If you are on an earlier version of Windows, Windows 10 will be a fresh breath of air.

With regards to security flaws, there is nothing really that indicate that Windows 10 should be more vulnerable than previous versions or other OS'es for that matter. Most operating systems are very secure, which is also why most malware now goes after the user and not the OS itself. It is easier to have some "next, next, clicker"-user install your malware for you, than trying to find a security hole in the OS today. Much easier...

Reports from 2014 indicate that OS X is currently the most flawed operating system. These reports are always controversial and prone to spawn debates of hateful character. So I am not going into that. But search "Most vulnerable OS 2015" on Google and decide for yourself.

With regards to the CSx, since it does not care about operating systems other than its own, nothing of the above would have any say the ability to update it.

There´s a reason about Windows 11.
Windows is an OS(operative system) and not an program.
You can already download or buy an CD Windows 11.
In fact did massmedia present Windows 10 do have bad security risk.
That´s way i did asked if Märklin do use the same OS?

Think there is some misunderstanding re programs and version nbrs
There is Windows 10 - operating system
and there is Windows explorer 11 , browser

Microsoft no longer provide security updates for Internet Explorer 10.
They still provide security updates for IE 11 and IE 9. Users should get the latest IE version supported by their operating system.

There is no Windows 11.

There shouldn't be any problems for Märklin when Windows users switch to the latest Internet Explorer versions.

My Computer is running Windows 10 very well, and yes it is a breath of fresh air after XP and Windows 8 I can only fully endorse upgrading to it

It comes with tutorials and manuals but it is as intuitive as things I've found before. So far I haven't read any tutorials or manuals

The key is to fully explore the menu icons at top right of the browser. The add to favourites "star", the three lines which are where your favourites are, and the three dots, to the extreme right, which is where most functions and setting menus are, are the ones I most use. I miss the right click for printing or saving tho not that it is necessary to print much these days

My biggest peeve is that, perhaps because I need to read a manual, when you open a new tab you always get MSN news which can be disabled, but, I can't readily work out how to set my preferred "home" page.

These things don't show on Google Chrome which happily functions on it's own, as before, and menus such as print are still accessed with a right click

I may stick with Windows seven, tried to download the free version of Windows 10 and it failed every time, an error message appears but I had no luck, even by following the instructions to be able to download it.

there are so many options why you can't download it and every time you try a different option it takes up to 4-6 hours to get through the whole lot only to find out your download has failed again at the end. so there could be some benefit to get Windows 11 (lol)

John