I've been playing the Sims 2 for years and I have about 6 expansion packs. My fiancee recently rebuilt my computer for me so it now has a lot more memory, better video and sound cards, dual processors, etc, etc. Every game I own worked just fine before the rebuild and now things crash. The Sims isn't the only one that crashes but it was the first one to start crashing and is the game that crashes the most often and for (as far as I can tell) no reason. I don't keep things running in the background, my graphics settings aren't any higher than they were before the rebuild (and if they didn't crash then, they definitely shouldn't crash with a more powerful PC), and there are no viruses or issues with any of my downloads, I've scanned my computer countless times. Usually when the Sims crashes it not only closes the game but restarts my computer, sometimes just shuts it down. This is sort of a dual part question: why does the Sims crash and why do any of my games crash? Any ideas?