Normally you receive a low memory warning message when you run many programs at the same time than the RAM installed on your computer is designed to support. Your can solve this problem by increasing the system paging file size also called as virtual memory. Using this virtual memory, windows will move information to and from the paging file for fast processing. This will free up enough RAM for other programs to run properly. To increase the system page file follow these tips...
Go to : Control Panel > System > Advanced > Click on Settings (Under Performance) > Advanced > Change
Here under Drive (Volume label), you have the option to select any of your hard disk drives, but the best choice is to select any drive other than C drive for virtual memory.
Set the double Initial Maximum Size of your Virtual Memory. Here set initial size 700 MB and maximum size up to 1000MB; you can change this size according to the free space available on your hard drive.