Some useful features of Windows 10 you may not be aware of:

6 Underrated Windows 10 Features You Must Try

If you don't want WhatsApp to share information with Facebook contacts, you can disable this in your account settings (but you won't be able to opt back in again later). Just un-tick the box.

Please be careful when updating software or browser plugins such as Skype, Flash Player and Java. When they prompt you to update, they sneakily try to install additional unwanted software or change your browser settings. You can prevent this by just un-ticking the boxes when prompted. See below examples where the boxes are ticked by default – you should un-tick all of these before proceeding.