Unreal Engine for fortnite crashing.

Hello. I installed Unreal Engine for fortnite 2 days ago. However, since its installation, all 15-30 mins, it crashes with the error:

Assertion failed: [File:D:\build\++Fortnite\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 180] Unreal Engine is exiting due to D3D device being lost. (Error: 0x887A0020 - 'INTERNAL_ERROR')

I checked many youtube videos, articles etc, no one has helped me to solve the problem.
I updated all my drivers - NOT WORKED
Did the Tdrdelay thing - NOT WORKED
Reinstalled Directx 12 - NOT WORKED
Reinstalled Unreal Engine - NOT WORKED

Would be appreciated to get some solutions ^^ Thanks.

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