When you installed Office did you put the product key in and Activate it?
Possibly you are in Reduced Functionality mode, check out the info on click here
- Click the Microsoft Office Button Button image, and then click PowerPoint Options.
- Click Resources, and then click Activate.
- If your software is activated, you receive the following confirmation message: 'This product has already been activated'
If your software is not activated, the Activation Wizard starts. Follow the instructions in the Activation Wizard.