unauthorizedaccessexcepti

I'm writing a small program in Visual Basic 2008 that flips the values of specific DWORDs in a registry key The registry key in question is: 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Render\{91801674-82d9-459a-9358-6e5cf3d81d21}\FxProperties' The dword I'm manipulating is " {e0a941a0-88a2-4df5-8d6b-dd20bb06e8fb},4 " This is the line of code I wrote to set the DWORD's value is this: Dim keyString = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Render\{91801674-82d9-459a-9358-6e5cf3d81d21}\FxProperties" My.Computer.Registry

This exception is occurring intermittently for the same user for the same machine, when reading files within %LOCALAPPDATA% . Research I have checked all the possible duplicates currently offered by this title (there are a lot). There is one relating to reading an AES encrypted file which has no answer; and I don't believe applies, since these files are not encrypted. Most of them are to do with writing files (but I'm reading a file), or are the obvious causes as documented on MSDN for File.ReadAllBytes(string) . The three explanations for this exception on there are: "This operation is not

The MSDN constructor for a FileStream says that it may throw either an UnauthorizedAccessException or a SecurityException. Here's what MSDN says about these exceptions. UnauthorizedAccessException: The exception that is thrown when the operating system denies access because of an I/O error or a specific type of security error. SecurityException: The exception that is thrown when a security error is detected. How are these two similar exceptions different? What situations will trigger either of them? A UnauthorizedAccessException is thrown when there is a permissions error accessing the file on

Before you try to answer this with, "Do a quick Google search." I'd like to point out that I have already. Here is the situation, I have the following method that attempts to modify a registry key value. The problem I'm getting is that when executed, it throws an UnauthorizedAccessException even though I've opened the key as writeable . I'm running Visual Studio as administrator and even tried to make a small .exe with a manifest file forcing it to run as admin that will execute the code with no luck. The key already exists, it doesn't try to go into the CreateKey method. Here is the block of

I'm using Microsofts SpeechSynthesizer to create audio output for my Windows Phone app. I use this code private async void TextToSpeech_Tap(object sender, System.Windows.Input.GestureEventArgs e) { SpeechSynthesizer synth = new SpeechSynthesizer(); await synth.SpeakTextAsync("You have a meeting with Peter in 15 minutes."); } I get this exception: {System.UnauthorizedAccessException: Access is denied. at Windows.Phone.Speech.Synthesis.SpeechSynthesizer..ctor() at NerdQuiz.Question.<TextToSpeech_Tap>d__1.MoveNext() --- End of stack trace from previous location where exception was thrown --- at