Where and how do i change or expand my virtual memory on windows?

my pc keeps on showinbg up a message my virtual mewmory is low and needs to be exapand chjange does it asffect my pc ina way that it wont show my emails and i can't even delete any eamils or make a downloadWhere and how do i change or expand my virtual memory on windows?
the best solution, is you need to increase the amount of RAM your system has, by buying more,

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