You should mention to adjust the page file you should strictly follow the instructions on the Microsoft page. There is a walk through.
Because if you change it and you dont know, what you are exactly doing without any advice, you can still have breakdowns, because the page file is too big.
But yes, its a valid solution after all. It worked for me too.
As i said, the random crashes arent a particular eft problem, there are a lot of games with this issue and most of them are related to the RAM usage, respectivelly to the management of the virtual memory.
Second thing: before i come up with this solution, i would like to make sure, everything is fine system vice. Random crashes are mostly related to RAM, but its so vague, there can be a lot of other problems still.
Its like going to the doctor with a headache. There are thousands of illnesses with headache as a symptome.