Engine Build System Crash

hello
attempting to build the Flex version of 4.17 from github.
after about 5 seconds from pressing ‘build solution’ in VS 2017 the system completely freezes, even the mouse pointer, then reboots.
could it be not enough ram?

specs:
I7 2600
GTX 750 ti
4gb ram

thanks

and the answer is…
crazy as it sounds, i needed a more powerful psu
500w is not enough to power a gtx 750ti even though it says it will run with 400w