title: python.exe is not a valid win32 application
body: <p>I found several topics relating to this issue (when I try to run python.exe in command line, I get the subject error message), but none of the suggestions worked for me. I have installed and uninstalled around 5 times now. I wasn't getting this error earlier tonight after first installing, FWIW.</p>
  
  <p>I am running Windows 7 64 bit. I realized that my first default 3.5.1 install was 32-bit so I uninstalled. Then I installed Windows x86-64 executable installer. I tried that twice. I switched to version 2.7.11 Windows x86-64 MSI installer. I still get this error. On the latest try (2.7.11), I ran Dependency Walker and got 3 errors:</p>
  
  <blockquote>
    <p>Error: At least one required implicit or forwarded dependency was not found.<br>
    Error: At least one module has an unresolved import due to a missing export function in an implicitly dependent module.<br>
    Error: Modules with different CPU types were found.</p>
  </blockquote>
  
  <p>The first error is that python27.dll is missing. I found that in the System folder and copied it into the main folder of my install (C:\Python27) and then also tried the DLL folder. Still getting my same error. Pulling me hair out and it doesn't help that I am brand new to python in general! I am worried that the uninstalls haven't been scrubbing properly or I have otherwise messed this up.</p>
  
  <p>Thanks and sorry!</p>