I am currently unemployed and trying to get more familiar with NPM. My desktop has an Intel Pentium D 3.4 GHz cpu with 8GB of ram running Windows 7 64-bit. I tried installing NPM and found it buried my system resources. Is it possible to get NPM installed in a way that leaves the system usable? As a second option, is a test site setup that I could log in to and play around with the product to become more familiar with how to use it?