.PPS opens as .PPT in Browser

Issue

Whenever you try to open the Powerpoint slide file .PPS from a web browser it opens it in Edit mode in .PPT format

 

Resolution

• Start Registry Editor (Regedt32.exe).
  
• Locate and click the following key in the registry:
  
• HKEY_CLASSES_ROOT\PowerPoint.Show.8
  
• On the Edit menu, click Add Value, and then add the following registry value:
  
• Value name: BrowserFlags
  Data type: REG_DWORD
  Radix: click Hexadecimal
  Value data: 0
  
• Quit Registry Editor.
  

The value of a causes the presentation to be opened in edit mode. The value of 8 causes the presentation to be opened in a new window in show mode. The value of 0 or the absence of this registry key causes the presentation to be opened in the browser window in show mode.

 

Reference : - http://support.microsoft.com/kb/299824