Glad to hear that reseating the card seems to have worked. Hope it stays working!
Let the PC shutdown properly before unplugging it from now on. d:
Also, maybe a UPS is in order? APC (while expensive) seem to be well recommended.
Considering that the last big thunderstorm we had fried my DVD player (TV one not computer) and my ethernet port, I was a bit paranoid. Point taken though.