While surfing i found a article on removing this irritating notification from MS office suite. I read from the site
and followed the steps in Hack 4:
Remove OGAAddin.connect Registry Key in System Registry
Pretty much similar to method 1 and 2, but it’s quicker and will complete remove trace of OGAAddin.connect from registry. Unlike hack 1, Windows Update may prompt you to install again.
1. Run Registry Editor (RegEdit.exe).
2. Go to each and every of the following registry keys, and any other which contains OGAAddin.connect registry value sub-key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Word\Addins
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Excel\Addins
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Powerpoint\Addins
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Outlook\Addins
3. Delete the OGAAddin.connect registry value.
