Melodycode

Microsoft has confirmed that Windows 10 is being downloaded to computers whether or not users have opted in, so if you have Windows 7 or Windows 8 you should be worried.

The rationale behind this choice is:

For individuals who have chosen to receive automatic updates through Windows Update, we help upgradable devices get ready for Windows 10 by downloading the files they’ll need if they decide to upgrade.
When the upgrade is ready, the customer will be prompted to install Windows 10 on the device.

How to avoid this shitty behaviour?

We need to disable/hide these updates in Windows Update (Windows 7/Windows 8):

[7]   KB 2952664
[8]   KB 2976978
[7/8] KB 2977759
[7]   KB 2990214
[7]   KB 3021917
[8]   KB 3022345
[7/8] KB 3035583
[8]   KB 3044374
[7/8] KB 3068708
[7/8] KB 3075249
[7/8] KB 3080149

If you are a tech savvy guy you can run this .bat:

wusa /uninstall /kb:2952664 /norestart /quiet
wusa /uninstall /kb:2976978 /norestart /quiet
wusa /uninstall /kb:2977759 /norestart /quiet
wusa /uninstall /kb:2990214 /norestart /quiet
wusa /uninstall /kb:3021917 /norestart /quiet
wusa /uninstall /kb:3022345 /norestart /quiet
wusa /uninstall /kb:3035583 /norestart /quiet
wusa /uninstall /kb:3044374 /norestart /quiet
wusa /uninstall /kb:3068708 /norestart /quiet
wusa /uninstall /kb:3075249 /norestart /quiet
wusa /uninstall /kb:3080149 /norestart /quiet
pause

Another solution is: Install Linux!