Hi,
Well, it looks like when DAQ was installed, the LabVIEW 7.0 support was also installed. This means that DAQ as a whole has a dependency on the LabVIEW 7.0 run-time engine, which for some reason seems to be absent from your system. I recommend you try repairing your DAQ 8.0 installation. Go to Add/Remove Programs from the Windows control panel, and press the Change button for the National Instruments Software item. Find NI-DAQmx 8.0 in the list and hit Repair. This should prompt you for the original installation disk, from which it will reinstall any missing parts.
It would really help if you could describe the order of installations/uninstallations/upgrades performed on that machine, if you know its history. All our installers should be properly designed not to remove anything that is still depended on by another product. You didn't by chance use MSIBlast or uninstall a product just by running the .msi file, did you?
Mert A.
National Instruments