I have a Vostro 260, 4 years old and no internal upgrades. Microsoft Flight Sim 2004 will not operate with the installed Microsoft  Windows 10 system, ( hate it ).

I have been advised to add more memory. Currently 2 GB DDR3.

 Question is, can I add more memory ,  how much, for this system to operate properly ?

I'm not that all computer savvy, thus the question.

I can be reached simply at    

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Thanks for any help.