Yes, this is a chronic nuisance when writing portable Perl scripts under Windows. Because our scripts run on many different customer machines, we don't have the option of removing the autorun value from the Registry. There are two ways around this:

• Use CMD /D to disable autorun; for example, print "\ncd=" . `cmd /d/c cd`; in your example program.
• Contrive to execute the command without invoking a shell; for example, system { $exe } @args, where $exe is the executable name and @args are its arguments (see perldoc -f exec for more details). Though more work, this approach leads to programs that are more robust and a bit more efficient, in that no shell process is created.

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