David, I have overhauled the BIOS manual and the BIOS itself and came with few remarks on the subject: 1). "powerup mouse double-clk" refers to option to power up the PC via keyboard shortcut [ctrl-F1] or double-click of the mouse. This option works ONLY if you have already shut down the PC once [i.e. it won't work the first time you plug the PC in], and is reachable via bios\\Integrated Peripherals\Power On Function [Button Only is the default]; also, you have to be _really_ quick with your mouse - I got it only after few tries. 2). The RESET switch always works, even if the machine is hung and power button doesn't work. If you want to shutdown a hung PC, Reset it, wait for it to POST and then shut it down. 3). One more option that you may try [I didn't] is located at bios\\Power Management\Power Button Override, and it (supposedly) allows you to shut down the PC by holding power button for 4 sec., regardless of machine's current state. Hope this aids you in your struggle! <> Max Timchenko [MaxVT] <> <> [log in to unmask] Do you want to signoff PCBUILD or just change to Digest mode - visit our web site: http://nospin.com/pc/pcbuild.html