title: Python wmi c.Win32_PerfFormattedData_PerfOS_Processor win7 error
body: <pre><code>&gt;&gt;&gt; for i in c.Win32_PerfFormattedData_PerfOS_Processor():
  ...    print i
  ...
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "c:\work\pythonsv\vendor\wmi.py", line 1029, in __getattr__
      return getattr (self._namespace, attribute)
    File "C:\Python25\Lib\site-packages\win32com\client\dynamic.py", line 496, in
  __getattr__
      raise AttributeError, "%s.%s" % (self._username_, attr)
  AttributeError: &lt;unknown&gt;.Win32_PerfFormattedData_PerfOS_Processor
  </code></pre>
  
  <p>Anyone could explain this traceback? Made a remote call on WIN7 machine.</p>