The Windows schedule ή Windows Timeline είναι ένα από τα πιο αναμενόμενα characteristics στο Windows 10 April 2018 update. Η Microsoft έχει ανακοινώσει το συγκεκριμένο χαρακτηριστικό εδώ και αρκετό καιρό, αλλά το διέθεσε επίσημα φέτος.
Windows Timeline should (normally) work normally after the new system is installed, but unfortunately it does not happen to everyone. 
It seems that although the Timeline appears in the UI it does not save your activity. Here are some details that you should check if your Timeline does not work.
Note that the Timeline takes at least one day to gather your activity. So to see some activity you have to spend at least 24 hours from the update.
Check if Timeline is enabled
Make sure the new feature is enabled, ie you should also allow the collection of your activity history. Open the Settings app and in the privacy settings select the Activity History tab.
Make sure “I allow Windows to collect my activities from this person” is selected computer".
Clear activity history
You may need to clear your business history. Open the Settings app, and from the Privacy tab, select the Activity History tab again. 
In the Clearing Activity History section, click the Clear button. You can do this even if Windows 10 did not have time to collect your activities.
Temporarily switch to a local account
This solution may be a little annoying but it seems to work. Open the "Settings" application and from "Account Settings" go to "Information". Click "Sign in to a local account" (not a Microsoft account) and you will see that the Timeline will work just fine on your local account.
You may need to stay in the local account for a while before switching to a Microsoft account. Many users report that thechange to the local account will fix Timelines not working, however you will need to use your computer for a while with a local account.
It should be noted that all the above Kompogianni solutions would not be needed if Microsoft did its job properly. The above solutions come from reddit and forums where too many Windows users try to fix their system after the last update.
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