For a long time I have had Solidworks (2003 all service packs)crash
2-4 times a day, then go for a few days with no problems & just as suddenly return to the crash scene. The crashes can happen while in a complex assembly,adding a centre-line to a drawing or just trying to save.
Believe it or not, since installing Microsoft Flight Simulator on my computer over a month ago I have only crashed twice & I can certainly live with that.
Go flying