I need some help. I just built a brand new PC. Specs are as follows: i7 2600k chip MSI H77MA-G43 MOBO Patriot 4x2 8GB RAM MSI Gforce 650 ti Samsung 8600 128GB SSD Windows 7 Home Professional 64 bit Computer works great, the only issue is that when I shut it down, it doesn't... The screen turns off, but the PC stays on. It appears that Windows does shut down properly, because when I power it up I don't get any errors. When I do a reboot, the PC actually shuts down and turns back on, however, it doesn't shut down or even go into sleep mode properly. I've tried the following already: Updated the BIOS Updated Windows video driver updated Still can't figure out the issue. I'm using a fairly old case (Cooler Master Cavalier), can this be the problem? The power button and reset button work fine. Any ideas?