I've got a strange problem that very occasionally (maybe once a month) when I plug-in something to the front USB on my computer, the computer suddently restarts. This also happens when I touch the front USB ports sometimes. This has been going on for a few years and a lot of the components in my PC have changed.

• I thought it was my home wiring, but I moved last year and it still happened.
• I thought maybe it was the motherboard, but that was upgraded 9 months ago and it still happens.
• I thought it was my case, but I changed that recently and it still happens.
• I thought maybe it was my PSU, but I upgraded that yesterday and it still happens.

I'm pretty sure this is an electro-static thing, but I thought that modern computers have protection against this sort of thing. Maybe I should move my case off the floor (carpet) and stop wearing songs all the time.

Edit: Just to clarify this is a computer that I built. The components have been upgraded throughout the years and it's not much the same computer anymore.

This doesn't happen very often, but it is annoying, because I don't know what the cause is. Anyone have any ideas?