I noticed something off when in my system tray, hardly anything that should have been running on startup was not there. I tried to run some programs and received a bad parameter error of some sorts. However, when I select the option to "run as administrator" some programs will work. When I go into safemode, it works fine. I did a system restore twice, each to a restore point where I didn't have this issue, and the issue persisted. If this helps at all, my problem began when I plugged an Xbox 360 controller into my PC. I suspect that's the culprit but I do not know how to undo what has been done. Nothing in the Event Viewer stands out, but here are the entries from when this began: There were two similar ones after that, then something that seems more serious when I rebooted: Does anyone know what I can do?