Unreal Engine crashes randomly

Hello, I’m experiencing this problem where unreal engine crashes randomly for no apparent reason. I have attached the crash log link text and I would be very grateful if anyone could help me.
Thanks,
Harry

[2018.09.09-09.14.11:160][262]LogD3D11RHI: Error: Result failed
at D:\Build++UE4\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Query.cpp:146
with error DXGI_ERROR_DEVICE_REMOVED DXGI_ERROR_DEVICE_HUNG
[2018.09.09-09.14.11:160][262]LogD3D11RHI: [Aftermath] GDynamicRHI=000002704653C0C0, GDX11NVAfterMathEnabled=0, Result=0xFFFFFFFF, bDeviceActive=0

It is not UE4 that crashes but your GPU driver. Looking on GPUs UE4 see:

[2018.09.09-09.08.19:319][  0]LogWindows:    0. 'Intel(R) HD Graphics 530' (P:1 D:1)
[2018.09.09-09.08.19:320][  0]LogWindows:    1. 'Intel(R) HD Graphics 530' (P:0 D:0)
[2018.09.09-09.08.19:320][  0]LogWindows:    2. 'Intel(R) HD Graphics 530' (P:0 D:0)
[2018.09.09-09.08.19:320][  0]LogWindows: DebugString: PrimaryIsNotTheChoosenAdapter PrimaryIsNotTheChoosenAdapter PrimaryIsNotTheChoosenAdapter FoundDriverCount:0 
[2018.09.09-09.08.19:320][  0]LogD3D11RHI:     Adapter Name: NVIDIA GeForce GTX 960M
[2018.09.09-09.08.19:320][  0]LogD3D11RHI:   Driver Version: Unknown (internal:Unknown, unified:Unknown)
[2018.09.09-09.08.19:320][  0]LogD3D11RHI:      Driver Date: Unknown

Those Unknowns suggest you don’t have NVidia drivers installed properly and UE4 is attempting to use Intel GPU build in your CPU which is know to not work well with UE4. Also check if you have your NVidia GPU enabled at all.

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