Magento CE sample data must be installed before you install Magento CE.
Magento Sample Data FAQ
Q: If I don't have data for the Magento template, what will the site look like to start with?
A: There are no products, no categories in the main menu, no sliders, no installed extensions, no Custom Menu banner examples, no static pages, and no blocks. There will only be a standard slider and static content in the sidebars.
Q: Why do you charge $90.00 extra to provide a clone?
A: It takes two weeks for our designer to generate each clone. We assume that anyone else would spend even more to create something similar, as we are quite proficient in doing this.
Q: Is the Total Slider Manager Magento extension included as part of the Sample Data?
A: Total Slider extension is available with the Template Sample Data. You should see it in the Magento Admin Panel, and it is fully operational. We provide it with no future upgrades included for Total Slider Manager extension.
Q: I have a live store and would like your Magento Template with all of its ads. How do I make my store look similar to your demo store?
A: Our Sample Data cannot be installed to an existing shop, as it would override your data completely. To make your store look completely like our demo, move the static blocks, page contents, and products with categories. You might make a fresh installation with Magento template Sample Data and copy all from this installation to your store.