title: Remote debugging Tools Cannot Install on Surface RT Running 8.1 Preview (cannot verify digital signature)
body: <p>I am trying to install Remote Tools on a Surface RT running Windows 8.1 preview. I downloaded update 2 of remote tools from Microsoft's site and when I try to run it I get the error:</p>
  
  <blockquote>
    <p>Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source.</p>
  </blockquote>
  
  <p>This is confusing because I downloaded the file directly from MS website and when I look at the <code>.exe</code> properties it says digital signatures by Microsoft Corporation.</p>
  
  <p>Any insight would be greatly appreciated.</p>
  
  <p>Thanks!</p>
  
  <p>Update: It seems like my Microsoft Root Authority certificate is "not valid for the selected purposes" I've tried exporting a "good" certificate from another machine and importing it into the Surface machine but it still gives the same issue.</p>