How old is your PC? Most newer-ish PCs have power management options that let you power down with a single button. My P4 supports this. in XP, go to Control Panel, Power Management, and in one of the tabs it asks you what you want the computer to do when you push the power button, one of the is shutdown. So, yeah, PC power switch hacked and hooked up standard arcade button on the top-rear of the cab. press that button, everything turns on, push that button, windows shuts down safely, everything turns off.