I didn't give much time for a response, but I did happen to find the issue. It had to do with the taskbar icon that was in the first slot. If I press the windows key and the number 1 key, it will open whatever application takes up that spot. OneNote happened to be in that spot. When clicking the arrows in SolidWorks, it was somehow sending a winkey+1 keypress. I switched the icons and put SolidWorks first, and it was no longer opening OneNote. After a system restart, I haven't seen the issue again. If anyone else runs across this issue, I hope I've helped. I'm not sure what the SW command for stepforward/backward is, but it seemed to have a small interference for a short time.