Which office version are you using? Update: Sorry, i saw the Headline now. You are using 2007 version.
You need to uninstall OGA/KB949810 Go to the following location Code: C:\Windows\SoftwareDistribution\Download\8998da55d52b36c0e98ba016ddd50de0\ Extract OGANotifier.cab using WinRAR to find a file named as OGANotifier.msi Right click on OGANotifier.msi, then select Uninstall Hide KB949810 update to avoid further installation