Somewhere, palSetup.msi must be on one of the installation discs. Is it possible that someone else installed some NI software on the machine? If you could tell me what NI software you have installed (i.e. NI-DAQ 6.9.3, or LabVIEW 6.1) then I will be able to help you better. Also, how did you come to uninstall NI-PAL? Were you uninstalling some NI software?