Gareway shut down

Hello,
I could respond to all of these comments the same way. I am here, because I bought a Gateway GT 5028 dual core, a few years back. I used it for a few months, then bam, it starts shutting off, for no reason. After messing with it for a while, I sent it back to the factory. They did a destructive reboot, lost all of my data, and sent it back.
The problem kept happening, and I sent it back two more times. On it's last visit home, they replaced my mother board. I had replaced the power supply before sending it back. To this day, it still shuts down at will. I bought a 3 year warranty extention plan, an enclosure, so that I could retrieve my own data, before shipping, and an HP lap top, that runs great, and has never failed even once, (knock on wood). So now, I'm stuck with this dinosaur, sitting in the middle of my room, and it doesn't even work. Every once in a while I boot it up, but it's always the same. It has a "malicious software removal tool", Norton anti virus, and Macafee anti virus, (not running concurrently), and still ,no go. If anyone has a clue, I'd appreciate it. I was told that Gateway is going down, and that I should never have bought it, but too late for that info. Luckily the 17" LCD flat screen, attaches to my HP nicely. Little compensation.