Since yesterday, I ran into the issue of S3 not waking up after going to sleep. Pressing the Power button only brings up a dark gray screen which after a while goes completely dark. May be a coincidence but it started to happen after the Microsoft Windows update (KB3116908) got installed. This has happened three times today and each time I had to hold the Power button and force a shutdown and then start again. Frustrating! Have looked at Event Viewer and each time failure to wake up from sleep is preceded by an error with LockApp.exe. The message is "LockApp.exe stopped interacting with Windows" and "App Microsoft.LockApp_...did not launch within its allotted time" Will appreciate your help in with the (a) wake up issue, (b) is it connected with LockApp.exe?, and (c) any suggested cure? Thanks!!