1. Enter the Properties window. Click on the Start menu. Right click on the 'Computer' button, and left click on the 'Properties' tab that appears at the bottom of the drop-down menu.
2. Open the system properties window. The exact phrase may vary depending upon which version of Windows you are using. Left click on the 'Advanced System Settings' button located on the left side of the window.

3. Open the Performance Options window. Left click on the 'Advanced' button on the top of the window, and left click on the 'Settings' tab in the Performance section. In the Performance Options window, left click on the 'Advanced' tab once again.
4. Change the size of the virtual memory. Virtual memory is unused space on your hard drive converted into use as additional RAM. Click on the 'Change...' button. If needed, deselect the 'Automatically manage page size' box on top of the new window. Left click on the 'Custom size' button. In the 'Maximum Size (MB)' tab, enter 1,000 more than the 'Currently Allocated' amount at the bottom of the window. Finally, click on OK.