We bought 3 computers from our local store (assembled locally by that store) and we have a problem with all of them - BSOD.
Sudden reboot happens most often when you plugin usb device or audio (into front panel), but rarerly it also happens if nothing is plugged into front panel. We have different operating systems (Win7, XP) but the problem is similar on all of them.
We (intuitively) assume that cases lack proper grounding or something like that which causes short circuiting.
Is there way to check it ourselves? Software testing won't help much here, right?