I've run LabVIEW 6, 6.1 and 7 on Win 98, NT, 2K and XP.
As far as I can remember, the only combination where I've seen it occur is LabVIEW 6.0.2 on Win2K and 98. In all cases when it happens, I always install under my user ID which has admin privileges (at least on the 2K machine), so I�m not sure what causes it. Since 98 doesn�t have the different levels of user privileges, I guess that�s probably not what is causing this particular problem. I didn�t think of that last night.
The install dialog that opens is looking for the runtime engine installer, so that�s what lead me to try uninstalling that to fix the problem.
Ed

Ed Dickens - Certified LabVIEW Architect
Lockheed Martin Space
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.