You need 2 GB of RAM, sounds like you have 4GB.
You will need 7 GB of Hard Drive disk space - I would hope you have a lot more than that. Chances are your hard drive came with 300 GB or more.
You know. I am really going to be mad; if I have to take this computer in for more space when I specially asked about upgrades and they said fine. Not good business practice being dishonest to customer.