Computer Upgrade

Last year we bought a new desktop from Future Shop. It was totally fine in the first two months. But now, the PC is becoming slower and slower and it freezes two or three times a day. Actually its configuration is quite good: Pentium 4 CPU 2.93GHz; 512MB RAM; 200G hard drive. We think the computer memory might not be large enough to support the application software we installed, especially when we run several applications simultaneously. So, we are going to upgrade the RAM this month.