Windows Vista Compatibility Issues
LabVIEW 8.5 supports the Windows Vista OS on 32 and 64-bit systems with the following functionality changes.
The In Port and Out Port VIs do not appear on the Functions palette because they allow read/write access to any I/O port on the system, which is discouraged for security reasons on the Vista OS.
(Windows Vista x86) VI components install properly but show up as unsigned in the Windows Defender log. The VIs do run properly.
(Windows Vista x64) These VIs return error -4850