They used to let you select features on the retail machines, but now you can't even change the memory or hard drive. It wasn't until I found the "medium size business" section that they let you adjust features of the machine and the OS.
I've never found Dell to be worth the bother. They are like too many retailers, only interested in you as long as they have your ear to talk you into buying the extra "junk" that makes them real money.
I rest my case. You have to pay extra to get this right then. How do you get the software once you have paid the extra cost of the Pro or "ultimate" versions?