Recently IGSS Update continually reports that I need to update two files called DanDEF.dll and Poldef.dll even though I’ve already updated them.
There is an error in the Microsoft .NET software and this directs the IGSS Update utility to incorrectly search for and find the correct files. The DanDEF.dll and the Poldef.dll files are incorrectly located in the IGSS install folder structure and must be deleted.
Locate these two files in the /gss sub-folder of your IGSS installation and delete them. This should solve the problem.