I'll mention this one little anecdote about ESD. I was working on a woman's PC, and we booted it, and it was working, and so, I went to put the case side on.
I walked across the (carpeted) room, picked up the case side, and walked back, and put it on. ZAP!!!!
Anyways, the PC was fine, but it rebooted from the static discharge. The woman said that that happened all the time to her, when she walked over to the PC and sat down and started using it.
I ascribe that to a faulty ground connection in her apt. wiring.
My thinking is, that even if there was a static discharge, the case should be grounded to the PSUs, chassis ground, which should be wired through the three prong IEC AC cord, to the outlet's earth ground, and thus, under normal circumstances, should not have caused the reboot.
At the time, I was very concerned, because that doesn't normally happen to me, so something was amiss.
I think, possibly, I had replaced her PSU, because it decided to do a "flame-out" on her, earlier that week.
(It was, thankfully, UL-listed. But still, hers is the only PC I've ever worked on, that the PSU actually did a flame-out on, and died.)
I also, in hindsight, ascribe that to her discharging static when she walked across the room to the PC, eventually damaging the PSU (I'm speculating), and causing the flame-out.
Nothing was overclocked, no heavy power-sucking GPU, just a P4 browser box, using a case+PSU bought from BestBuy.
A friend of mine also ended up with that same case+PSU (I bought several), and while his PSU eventually died a few years later, and was replaced (same rig is running today, with newer guts, but his was a P4 originally as well), it never did any sort of flame-out.