I was working on my first built this past weekend. It boot up just fine, but when I tried to install Windows7 it shutdown while loading the installation about 1-2 mins.
My system is Intel core i5, has Gigabyte z68 motherboard and Apevia 700W. I do not have any fancy video card install yet (planned to add that later) so it shouldn't be the PSU that's causing problem.
I tried to think of what might have went wrong when I was putting things together. I lifted the heatsink fan up after I first put it down for test boot so the thermal paste wasn't spread that well... I guess. I didn't reapply the thermal paste..... Can the uneven paste cause the shut down or it's something bigger?