follow the following steps……
1. Go to start, and right click on computer and choose properties.
2. Now choose Advanced system settings, and in new opened window choose Advanced tab and under Performance click on Settings button.
3.after this now again opened new window. Choose Advanced tab again and under Virtual Memory press on Change.. button and
uncheck Automatically manage paging file size for all drivers line and set values as per your requirements
And press on OK button, it need to restart your computer restart and now you done….