I assume my PC should allow a scheduled task to 'wake' my PC on command, but it does not work. It works on another PC I have access to and cannot figure out what is wrong.

I have Hibernation enabled and have the wake PC on activating task enabled.

What am I missing?

The "Wake" ability of the scheduled tasks doesn't work when you put a computer into hibernation, as far as I know.

You have to realize what hibernation is, it's essentially a full shut down, but all your current programs and such that were in memory are stored on the hard drive.

When the computer's fully shut down, there is no way for Windows to initiate a scheduled task, because Windows doesn't keep track of time while the computer is in hibernation.

The Wake feature does, however, work with a computer in Standby. This is because Windows is still active, just in a low power state.

Hope this helps.