Unreal engine crash randomly

Every think starts in the first day i install unreal engine its crash randomly
I was install 4.18 first then i update 18.1 but keeps crashing
I install 4.17 but no still crashing
There is no crash report its says You do not have any debugging symbols required to display the callstack for this crash.
I try as admin
No antivir installed in my computer
Its crash in blueprint screen, when i was playing demo, when i was just flying in the demo editor
I try fps,third,blank projects
I update nvdia drivers
One of my friends have the same problem with me

Well i found the problem
Its my ram memory. Sometimes my others app crash and windows give me blue screen but everytime when i use unreal it crashed. Probably it use so much ram and my ram was broken.

I change my ram and no problem for a month