Hello @Lilgogo28 ,
Use Windows Eventviewer to locate the problem:
Press WIN Key + R after a crash occurred. Type in “eventvwr” and check if you can find the fault or error that caused MSFS2020 to crash. It should be under Sytsem/application or something like that in event viewer. Post the error details here.
Additionally Alienwares may be delivered in an overclocked state, which may not be stable.
You can also open a ticket at MSFS Zendesk for further assistance.