Re: Disable sleep
I had started fiddling with this only shortly before this post, but in the sense that I wanted Restart to be the default action on the Start Menu's power button, rather than Shutdown.
I thought that I had solved this in gpedit, by enabling it in gpedit>User Administration>Administrative Templates>Start Menu And Taskbar>Change Start menu power button, but unfortunately, even though it did display Restart as I hoped, immediately after the edit, a short time later, it had reverted to Shutdown. I rebooted to see what would happen, and again it showed Restart at first, but reverted again.
I went to the path mention by Greg, and it does show Restart, but it is grayed out. I would imagine that the solution for this is along the same lines as for the OP's question, but I have given up for the moment. I fail to understand why it is necessary to have multiple means of accomplishing something, but one ignores the other.
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