Well, those are 2 different PCs, so it's hard to compare them. Anyway I'm sure we all can come up with opposite stories as well, so to continue with anecdotes: unlike back in the days, blue screens (well, the ones I encounter, like 1 a year across 50+ machines of all ages) now are most often caused by actual harware failures the OS (be it Winows or linux) cannot cope with. Pre Windows-7 every stupid driver manufacturer would cause it instead. At least that has been fixed now.