We have two machines in our office and several at customer sites that have started giving "OLE Error code 0X80040111 ClassFactory cannot supply requested class" after Norton AntiVirus 2005 was installed. Affected machines return the same error running this line from the FoxPro command window:

oWord=createobject("Word.Application")

I Initially thought it might be related to Norton's ScrBlock.dll being set as the InProcServer32 for the CLSID, but that's the case on my machine too, and my machine works fine. I don't have Norton 2005.