In order to solve this issue here is a freeware tool Minimem, which will reduce the memory usage of any application very effectively. The tool is useful, especially if the computer is entry level with latest applications.
It optimizes memory by removing as many non-necessary memory pages as possible from the selected processes.
After installation, just select the memory intensive active processes from the right side of the program window and add them to the left side, click Apply and these processes will now be optimized every 30 seconds by default. [Via]
The program supports Window 2000/ XP and Vista. More information and download.