Every day I get a 6:40 AM alarm for last 3 days. THere is no alarm configured. Seems like an older version configuration before the upgrade. I can't remove the alarm app and reinstall ... any tip on how to reconfigure this ?
See if this will work for you.............
Start button > All apps > under A, select Alarm & Clock > you can either move the slider to turn alarm off.

OR, bottom right, click the + icon and change the Alarm time.