How to set your browser to display PowerPoint slides

1. Open My Computer. 
2. On the Tools menu (or the View menu), click Folder Options
(or click Options). 
3. Click the File Types tab. 
4. In the Registered file types list, click the specific Office
document type (for example, Microsoft PowerPoint), and then click
Advanced (or click Edit). 
5. In the Edit File Type dialog box, click to clear the Browser in same
window check box (or click to clear the Open Web documents in place
check box).  
6. Click OK.