Virtual memory allows the system to use hard disk space to store information normally stored in RAM. Windows 7 and Windows Vista manage virtual memory by using a paging file. You specify the minimum and maximum size of this file. If the size is different from the default in Windows Vista, applications may return errors. However, some applications may require a non-default size for the paging file. Change the size only if other applications aren't adversely affected.
To set the paging file to the default size, follow these steps.
Note: You must be logged on as an administrator to change the size of the paging file.
From the Drive list, select a hard-disk partition that has free space equal to at least three times the amount of the computer's installed RAM. To determine the amount of space available on a hard-disk partition, click the drive letter; the amount of space available appears in the Paging File Size For Selected Drive area.