Windows 10 aims to make your daily work as easy and hassle-free as possible. This enhanced comfort is to be taken with a grain of salt though: Windows 10 quite freely shares your personal data with Microsoft and certain apps.
Windows 10 has numerous functions that enable Microsoft to collect and analyze your data. This is not restricted to sharing WLAN passwords with friends and acquaintances on Facebook and Skype, which has been widely reported, but goes as far to include the actual transfer of personal data such as contacts and calendar entries. This is then used to improve the recommendations from the new Windows 10 assistant “Cortana”, for example.