Unreal Engine 4.18.1 is crashing every time I starts and I had sent many crash reports but till there is no answer. What to do? please

I’am new to Unreal Engine and want to use it but till the day I had downloaded it it’s not working. This is the famous and powerful application but it crashes every time i starts . Not even a single time it get started . Referring to this I had sent many crash report but there is no answer or reply yet . So please tell me what to do ? I will be very thank full to you .