Change the size of virtual memory
If you receive warnings that your virtual memory is low, you'll need to increase the minimum size of your paging file. Windows sets the initial minimum size of the paging file equal to the amount of random access memory installed on your PC, and the maximum size equal to three times the amount of RAM installed on your PC. If you see warnings at these recommended levels, then increase the minimum and maximum sizes.
Open System by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering System in the search box, tapping or clicking Settings, and then tapping or clicking System.
Tap or click Advanced system settings.
You might be asked for an admin password or to confirm your choice.
On the Advanced tab, under Performance, tap or click Settings.
Tap or click the Advanced tab, and then, under Virtual memory, tap or click Change.
Clear the Automatically manage paging file size for all drives check box.
Under Drive [Volume Label], tap or click the drive that contains the paging file you want to change.
Tap or click Custom size, enter a new size in megabytes in the Initial size (MB) or Maximum size (MB) box, tap or click Set, and then tap or click OK.