I personally have not had this happen to me, but I have had three other people ask me where to find a file called winhlp64.exe. I don't have a 64 bit OS (running Vista 32 bit) but I directed them to the windows home page or microsoft.com. Well one of the people who asked me came back and said they couldn't find the file anywhere. I pulled out my laptop and tried a search for it but only came up with two hits, one in what appeared to be a German forum (I don't speak German so that didn't hep) and another site which was in, as far as I could tell, some sort of Asian writing and that didn't help at all. I could find nothing at all in English or on the windows home page or microsoft.com. I am assuming it's the 64 bit version of the windows help file. Does anyone know for sure what this file is if it exists, or where it can be obtained?