In answers of a question on superuser.com is a powershell script for disabling wake ability for all scheduled tasks. It is scheduled to run every 30 minutes, that should take care of...

I have done that, but somehow wake timer still gets scheduled. As I said I have disabled wake timers for all power plans, so it shouldn't even be possible. Annoyingly, the new version of Spotify...

I would like to know this as well. I have Wake Timers disabled in Windows 10, but PC keeps waking up from timers.