New to April’s Windows 10 update, the activity history, in English, the Timeline, allows you via the Windows+Tab keyboard shortcut not only to view your open windows and virtual desktops, but also to browse through the timeline on the right, your recent activities from your various devices synchronised in the cloud. If you have nothing to do with this feature, learn how to disable it.
To do this, open the Control Panel via right-click on the start Menu, then Settings.
Then click on the icon Confidentiality, History of activities in the left column under Windows permissions.
On the right side, uncheck the box Allow Windows to collect my activities on this PC, and Allow Windows to synchronise my activities on this PC with the cloud.
The changes are immediate.
If you do Windows + Tab, you will no longer see the activity history but only your virtual windows and desktops.
A totally useless option that only serves to spy on you and consume bandwidth.