SOPHOS computer security firm has warned that hackers are spreading a nasty computer virus with a file promising a PowerPoint presentation of sexual positions from the Kama Sutra.

Launch Microsoft PowerPoint, and open the PPTX file for which you want to use a GIF as the background. Select the appropriate slide. Click the "Design" tab, and locate the "Background" section.

Here's how to use the "Format Background" feature to change your PowerPoint slide background. Check out the products mentioned in this article: Microsoft Office (From $149.99 at Best Buy) ...