Hi samson,
I haven't encountered anything similar to this error. Does the Windows installer give any information on what it is attempting to install? Have you reinstalled LabVIEW yet? Although it's mysterious why this has started happening, there is a very good chance that uninstalling and reinstalling LabVIEW will fix the problem.
I hope this helps. Let us know how it goes
Megan B.
Applications Engineer
National Instruments