I had a similar problem and solved it like:
use Win32API::Registry qw(:ALL);
...
if( RegOpenKeyEx( HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Cryptograp
+hy", 0, KEY_READ|0x0100, $key ) ) {
RegQueryValueEx($key, "MachineGuid", [], $type, $nodeId, []);
RegCloseKey( $key );
}
The point is 'KEY_READ|0x0100'.
From http://msdn.microsoft.com/en-us/library/aa384129%28VS.85%29.aspx:
#define KEY_WOW64_64KEY 0x0100
Access a 64-bit key from either a 32-bit or 64-bit application.
regards
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