After upgrading to the Windows 10 Anniversary recently, I'm getting the following problem in Power and Sleep option using screen and sleep.

I want to change the “When plugged in turn off after” box from 4 hours to 1 minute.
Successfully change then I exit.
Normally, after 1 minute, my screen will dim then go black.

Now the following happens:
1. Screen goes to the Login screen
2. An instance of Chrome and Mozella browsers is launched
3. Task manager & Open Office is launched
4. Cortana sends me a msg in the top left reminding me to Water Plants”
5. If I let the screen set longer, my Photo app gets launched.

When I tap screen then enter my logon password, all the above apps disappear at desktop menu.
Anybody had this particular problem or know a solution?