UE4 Frequently Not Responding

My UE4 Editor stops responding, about 20 -30 mins periodically. It happens on multi version of the engine (4.15-4.19) , and all the project I were working on this computer. The windows task manager shows the memory the engine uses stop changing, and it have minimal CPU activity. My computer stats are: Win 10; 32GB memory ;i7-6700kCPU 4GHZ ; Nvidia Geforce GTX 1080. I’m also using visual studio 2015 for C++ coding.

I hope there’s a solution, and thanks for helping.