Any ideas on what to do about these errors?

4:35:55 3DF Building the client extractor...
14:35:55 3DF Error: Missing files that are required to build client extractor
14:35:55 3DF Error: Unable to build the client extractor [0x8209]

These have appeared regularaly, even after applying Messenger SP6. I would
like to avoide reinstalling from the ground up!

When I rename the *.ex_ files to *.exe, and run EXTRACT.EXE, I get a
message that "Setup was unable to extract the necessary files. Compressed
setup file is corrupt.

Please help. There is pretty much nothing "out there" as to guidance on
this particular problem. I will re-build the CAB's if I have to.