I'm running into an issue installing 5.1 when it is checking files in use before installation. It is stopping because it says common operating system files are running. There is, of course, no way to stop these files from running so I need to know what may be causing this to stop or a workaround to get this product installed as it is supposed to be fixing other issues that I'm having with NCM. I have attached a screen shot for review. --Jordan