title: Setting permanently variables in windows %username%
body: <p>i need to set permanently the %username% variable on windows is that possible?</p>
  
  <p>I mean if I do on command prompt set username=UPPERCASE I can see that the variable is changed, however as expected this does work just in that command prompt, If I open another one the username variable is the original.</p>
  
  <p>I tried to find the correspondent registry value but I did not find it.</p>
  
  <p>I need some automatic way to do it.</p>
  
  <p>Thanks!</p>