Perhaps it is. Thanks for the info, I'll try to turn off said Windows feature and see if it works as expected. In case it solves the problem, sorry for creating a duplicate question, a quick search resulted nothing useful.
Right now, when I let Sync start itself on system startup, it shows the Sync window, which I have to close every single time. It would be nice to have an option which would let me have Sync start up minimized to the system tray. Many applications have this feature, but as far as I can tell, Sync lacks this. Thanks!