title: WinVerifyTrust fails rarely
body: <p>I use winverifytrust to validate signature.</p>
  
  <p>I am verifying using WINTRUST_ACTION_GENERIC_VERIFY_V2. But rarely it has returned "NO SIGNATURE FOUND".  I am unable to simulate the issue. </p>
  
  <p>I am getting feedback  that this is happening in some users. One feedback has a log which indicates that the 1st call to WinVerifyTrust for a file succeeds and the second call to the same file has failed.</p>
  
  <p>The code i used is exactly</p>
  
  <p><a href="http://msdn.microsoft.com/en-us/library/aa382384%28v=VS.85%29.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/aa382384%28v=VS.85%29.aspx</a></p>
  
  <p>Any idea what may have caused the failure. Same call to the same file has succeeded once and failed next. </p>