Powerpoint could not open the file.Com Class component error ---System.UnauthorizedAccessException

One of our developer was getting following error whiel working with Office powerpoint object to integrate different slides in one PPT in SharePoint...

System.UnauthorizedAccessException: Retrieving the COM class factory for component with CLSID {91493441-5A91-11CF-8700-00AA0060263B} failed due to the following error: 80070005........

One should follow these steps to fix it..

DCOM Configuration
1. Click Start -> Run
2. Enter DCOMCNFG and press OK. This will open the DCOMCNFG window.
3. Browse down the tree to Console Root -> Component Services -> Computers -> My Computer
4. right-click on "My Computer" and select properties
5. Select the "Default Properties" tab
a. Enable Distributed COM on this computer - Option is checked
b. Default Authentication Level - Set to Connect
c. Default Impersonation Level - Set to Identify
6. Select the "COM Security" tab
7. Click on Access Permissions ' Edit Default
a. Add "Anonymous", "Everyone", "Interactive", "Network", "System" with Local and Remote access permissions set.
8. Click on Launch and Activation Permissions ' Edit Default
a. Add "Anonymous", "Everyone", "Interactive", "Network", "System" with Local and Remote access permissions set.
9. Click on OK
10. Close the DCOMCNFG window