It could be a case of the computer running hot, and shuts down automatically to protect itself.
Real men don't whine.
Love your tag line rdb3. rofl.
Usually when the computer runs hot, it doesn't start shuting down until it's been on a while.
They recently added Cable to it....and one day he tells me that he couldn't even shut it down because a message said that someone was using it....so that's when I asked him if he had a firewall and asked me what that was....so CABLE and NO FIREWALL.....someone took it over. He had to pull the plug to shut it down.....I think it started there?