Long story short, I installed the Windows 10 tech preview on my HTPC. After a recent update to build 10041, I noticed that Windows has started to handle at least some of the commands that are being sent by my remote (a Logitech Harmony One using commands from some generic Windows multimedia remote) in addition to the actions I configured in Event Ghost from before the Windows update.
For the commands that Windows is handling, this essentially causes two keystrokes to be sent to the active window. This isn't terrible, as I can just disable those keys in Event Ghost. However, when I have my remote (or more specifically, Event Ghost) in mouse emulation mode, this causes problems. Every time I hold down a mouse movement button, it also sends the corresponding arrow key. Also, the button I mapped to the left mouse button is the same as what Windows recognizes as the enter key. Whenever I want to left click something, I also hit enter.
I've got Event Ghost set up the way I like it, because Windows was all but incapable of doing what I wanted with the remote by itself. How do I get back to that, where Windows will basically ignore the remote?