title: Arduino COM port not found
body: <p>For the past week I have been programming an Arduino Uno with a computer running Windows&nbsp;7. When I first started, I found the device on COM6 and was able to upload code no problem. Recently it suddenly stopped receiving code under the error:</p>
  
  <blockquote>
    <p>Serial port 'COM6' not found. Did you select the right one from the
    Tools > Serial Port menu?</p>
  </blockquote>
  
  <p>The <em>Serial port</em> menu though is grayed out. Research has told me to open up Device Manager and update drivers but there is no other devices tab in my Device Manager. The Arduino is run off the power of the USB cable and runs the code I uploaded a few days ago just fine. What can I do to be able to upload code to the Arduino?</p>
  
  <p><strong>Update:</strong></p>
  
  <p>I installed the Arduino software on another computer and it does not recognize the Arduino either. One of the comments indicates that this could be a problem with the FTDI chip. How can I test if this is the case, and if it is, can I fix it?</p>