Doubt it is memory related since all applications including Windows itself would be unstable.
Noticed non-MSFS error in your above post pointing to ucrtbase.dll which alone can cause app crashes.
Quick access cache can be cleared by deleting *.automaticDestinations-ms from the following directory using Command Prompt.
%AppData%\Microsoft\Windows\Recent\AutomaticDestinations
^ or
Press Windows key + R
Type: %AppData%
Hit Enter
Then navigate to that folder manually.
Perform the above then try again and report back.
Edit:
since you are on a new machine, make sure power plan is Balanced and turn off Game Mode… both can be searched on the taskbar.