What do you get when you run the command through ssh without a tty? 
ssh $WINDOWS_HOST 'c:\psexec.exe /accepteula c:\psexec.exe /accepteula
+ \\localhost wmic OS get Caption'

[download]

psexec may be expecting a GUI environment, event if it doesn't seem to use it.

The issue may also be related to quoting. Windows SSH servers use different approaches to launch commands. Some run them through cmd.exe, others just call the function CreateProcess from the Win32 API, etc.

In reply to Re^3: Perl with Net::SSH2, vshell and psexec by salva
in thread Perl with Net::SSH2, vshell and psexec by t_rex_joe

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