Random Crashing

[Pent]

I recently came back from a month break. Ever since I reinstalled I've been dealing with random crashes. Today I crashed while afk which doesn't seem to make sense to me considering there was very little stress on the game or the machine. The other day I crashed in the GHS event. Another time I crashed while looking for dungeon in the dungeon finder. So it seems to be pretty random. I am running a somewhat dated machine but the hardware is up to snuff.

Intel i7 2.3Ghz

16GB Ram

Nvidia GTX 675M