Why can't I install the latest Wireshark on Windows Server?
I get a message saying vista is not supported even though vista is not the operating system.
If the installer is mis-identifying the platform as Vista...
...then the NSIS code
ReadRegStr $R2 HKLM \
"SOFTWARE\Microsoft\Windows NT\CurrentVersion" InstallationType
in GetWindowsVersion.nsh is reading a string other than "Server" from the Registry on Windows Server 2008 (assuming code flow in NSIS language works the way it does in other languages, it looks as if, were it not to read either "Client" nor "Server" from the registry, it'd fall into the same code that handles "Client").
On what version of Windows Server are you trying to install it?
And did you get the message