How to download more ram?

You can't download RAM. It is hardware chip that serves as temporary storage for data. RAM stands for Random Access Memory

For instance, when you open Microsoft Word (or any program), it goes into RAM because your CPU can get it a lot faster from RAM, than if it tried to get it off of your hard drive

RAM modules look like this -

Use Speccy to determine type of RAM - http://www.piriform.com/...com/speccy
To upgrade RAM, open your PC check if there are empty RAM slots

If yes, buy another exact RAM chip from http://www.amazon.com/...ode=172500 and gently insert into RAM slot. Then turn on your PC to see upgraded RAM on boot screen