Go to Start, and then to Run (or the Win and R keys)
Type in "dcomcnfg" (without the quotes) and press Enter
In the Component Services window that opens, go to the left hand pane and double click on:
- Component Services, then on
- Computers, then on
- My Computer, then on
- DCOM Config
If it asks you to register any of the components, click Yes
This may happen several times if there are several unregistered components
Once you're finished, close the window and reboot the computer.
Check to see if the problems are fixed.