Did I Get Fucked?

[Undertow]

I have a question to anyone that can offer their opinion, expert advise or not.

I bought a name brand laptop a few days ago for a damn good price and think I got fucked on the hard drive space. In the advertisement and on the box it says it is supposed to come with 160 GB. However, when I click on the C drive it says I have only 122 GB available out of 140 GB. This is a brand spanking new laptop, right out of the box. Anyone know what could be up with the hard drive problem?

Other than that, I like it a lot. The price was great, something you don't come across too often. I pretty much payed $380 for a laptop with:

Vista
15.4 inch screen
2GB memory
DVD burner
HD ??? Supposed to be 160
Built in Wi/Fi.
Other software/accessories

Basically, I have about a week to return it. After that I am stuck with it. Odds are that I won't be able to get an exchange because they sold out in a matter of hours. It was one of those "while supplies last sales"

If you guys were in my shoes would you keep it, get your money back, or call someone and bitch? I have never heard of someone missing almost 40 GB that should be there. Any suggestions?