Wondering if anyone else is getting this problem.

Last night was fine (has been since I started) I haven't made any changes at all, no installs, no un-installs nothing. After coming home from work I find servers down for Maint (ok, it needs to be done, thats a given) update the client as usual and now when I log in, my whole computer shuts down after a few minutes of being in-game.

Any ideas? I've already submitted a support ticket, but it will be at least 24hrs before I get a response (due to my location)