Follow this procedure and your problem will be resolved. Do exactly i say..!
Step 1:- First Downlaod the windows Clean up utility.
Click on the link above --> and then Under Summary Option on this page.
Click on the link mention below:-
( Download the Windows Installer Cleanup Utility package now.
Install the windows clean up utility on the computer.
Once it is installed Hit the finish button.
Now Click on start-->go to All programs-->navigate
Microsoft windows Clean up utility software.--> click on it and runn it.
Once the Clean up utility window opens up.
Find out sonic Update Manager in the list you see.
Click on it and highlight it .
Now click on the button remove at the botton of that screen.
Once it is gone. Restart the computer your system will not pop up that message again.
( Reason :- The reason why you are getting that message is that the sonic Update Manager software is not installed properly on your system which is why it keeps poping up the MSI ( microsoft Installer ) on your screen for sonic Update Manager. )
So to get rid of it just remove the MSI from the list in windows clean up utility and it will not pop up again.
Let me know if it works for you.
Please do follow the instructions as provided. It will work.