Some applications require high amounts of memory in order to work properly. The simple way to overcome this issue is to close the background running applications. Right-click the Taskbar and select Task Manager. Switch to Processes, and close all the background applications. Additionally, you can go to Start > Run > msconfig and disable all the boot starting apps, then run your application as Administrator.
I have tested this way when I encountered an issue with the memory and scanning, and it worked.