I couldn't find it in my LV directory (7.0). Could it have come from a module I don't have installed? Which modules do you have installed?
The DLL is probably located in one of the CABs on the CD of the owning software. I believe you can tell windows to search through the CABs, so you should look for it there.
However, it might be better (and even faster) to just reinstall, especially if you don't know where it should go. Also, instead of doing a full reinstallation, you can just do a repair (go to Control Panel>>Add and remove prgrams>>NI software).
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