To my previous question.. I think I know what's going on, but I don't know why. The BTSync.exe process that's started on system startup opens the following file: C:\Users\Default\AppData\Roaming\BitTorrentSync\sync.log which is the Default user, instead of the Admin user, even though, it's launched as Admin. For some reason, USERPROFILE and APPDATA env variables point to Default user's folder. If I restart the task manually though, while signed in as Admin, the APPDATA points to Admin user - as expected. Something very similar is described in this thread: http://social.technet.microsoft.com/forums/windows/en-US/9ffd9d23-b939-435f-bb87-f650dc0703d4/scheduled-task-in-windows-8 The point is: THE SCHEDULE TASK METHOD DOES NOT WORK ON WINDOWS 8/8.1 Darn, here is Microsoft's acknowledgement of this bug in Windows 8/8.1: http://support.microsoft.com/kb/2968540 Still looking for a workaround..