Adobe Air URLRequest to Local File Works Windows 7, Not 10 - actionscript-3

Question

I developed an Adobe Air App for a small intranet. All computers have been running Windows 7, but now are beginning to be replaced with Windows 10 systems. I can access the mapped drive "I" and the local "C" drive using the file class on Windows 7 machines, but only the mapped drive "I" on Windows 10.
Edit: Capabilities.localFileReadDisable returns false on both Windows 7 and Windows 10 systems.
****I could bypass the need for the local file if Air could get any specific information about the machine it is running on, serial number, mac address, computer name, etc. It really makes no difference what information I get, it just has to be unique to that computer. And using cookies isn't an option because they are volatile****
The following code accomplishes two things.
First, it displays the running version of the Air file and looks for a file on a mapped drive with the latest version available. If they are the same, the computer is running the latest version. If they aren't the same, the new version is displayed to the user, indicating the app should be updated.
Second, it grabs the name of the specific computer from a text file residing on the local drive. That name is used on reports to indicate which computer was being used. There is probably a far superior way to accomplish this, but on Windows 7, it works perfectly for me. Unfortunately, Windows 10 throws an error when trying to access the file on the local drive.
Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: file:///C:/machineName.txt
Any help would be greatly appreciated.
var appXML:XML = NativeApplication.nativeApplication.applicationDescriptor;
var ns:Namespace = appXML.namespace();
version_txt.text = "V"+appXML.ns::versionNumber;
// Define path to the version number
var updatePath:URLRequest = new URLRequest("file:///I:/air/update.txt");
// Define path to name of specific pc
var machineName:URLRequest = new URLRequest("file:///C:/machineName.txt");
// Define the URLLoaders
var updateLoader:URLLoader = new URLLoader();
function checkUpdate():void{
updateLoader.load(updatePath);
}
var nameLoader:URLLoader = new URLLoader();
function checkName():void{
nameLoader.load(machineName);
}
// Listen for when the file has finished loading.
updateLoader.addEventListener(Event.COMPLETE, loaderComplete);
function loaderComplete(e:Event):void
{
// The output of the text file is available via the data property
// of URLLoader.
if(Number(appXML.ns::versionNumber)<Number(updateLoader.data)){
update_txt.text = "UPDATE TO V"+updateLoader.data;
}
}
nameLoader.addEventListener(Event.COMPLETE, nameComplete);
var name_txt:String = new String;
function nameComplete(e:Event):void{
name_txt = nameLoader.data;
var holder:String = version_txt.text;
version_txt.text = name_txt+" ** "+holder;
}