Consider buying a new computer because the one your using is totally a piece of crap or maybe not. Does your computer having a hard time running multiple application? If your answer is YES then you should add more memory into it. The highter memory of a computer the better it performs and can handle multiple program at the same time. Buy memory and let the expert do the installing if you are not sure what to do. Before you buy a memory for your PC let me remind you that computer memory are not all desame and it depends on the processor and circuitboard of the PC. Present computer uses DDR1, DDR2 and the lastest version is DDR3.