Oh man... I remember that time I tried to fix an issue I had with my pre built dell that was out of warranty. Sharp edges to cut your fingers and hands open everywhere. Cramped and really hard to pull apart which meant that you found all the sharp edges in the process. Designed to be hard to repair or upgrade with one thing always leading to the next. So I stopped trying, put it all back together and then it would not boot anymore. Cause for some reason the hard drive was suddenly unusable.
That was the last time I bought a pc and have since built all of them myself.