Visual Studio 2012 unable to activate Windows Store App - visual-studio-2012

Yesterday while I was working on my Windows 8 App in Visual Studio I ran into an error in Visual Studio:
Error: Unable To Activate Windows Store App "ff82Aa95f-51e3-4869-a77a-7a9f52af3aea_aqtq9fhtdt8n6!APP" The WWAHOST.exe Process Started But The Acivation Proccess Failed with Error: "Access is Denied.
How can I resolve this?

To solve this, double-click manifest file and select Packaging tab you will find Package identity there.
By changing the package identity little bit your app will start to work fine.I have this problem too sometimes. Actual cause I don't know. But it works every time for me.
If original package identity is this "ff82Aa95f-51e3-4869-a77a-7a9f52af3aea_aqtq9fhtdt8n6" then change it to "ff82Aa95f-51e3-4869-a77a-7a9f52af3aea_aqtq9fhtdt8n7" here i have only change last digit 6 to 7.

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It seems a issue caused by visual studio instead of azure. You may have a corrupt install and depending on the order that dlls are loaded determines whether you see the error or not.
This is a workaround in the similar issue that you could refer to.
The workaround - which does not always work right away - is to Sign out of Visual Studio (This takes 2 attempts to sign out and remove the credentials). Then reboot the PC. Once logged into WIndows, launch Visual Studio - DO NOT SIGN IN. Open the solution, right click on the Deployment project; which may or may not trigger the same dialog error. If the deployment dialog is display, then i can add account and deploy. Otherwise, i must turn off the PC and try again, and again, and again, until it starts working.
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I am getting the following error screen
As I commented above, I have been having exactly the same problem for a week or two.
Originally, Visual Studio was installed under a non-admin user account (using an administrator password where prompted).
I eventually did a complete uninstall using the script mentioned here, and then reinstalled from scratch using an administrator account. This seems to have fixed the problem.
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Image
Try to uninstall Android SDK and install it again from Visual Studio.
Uninstall SDK from - C:\Program Files
(x86)\Android\android-sdk\uninstall.exe
Go to control Panel -> Uninstall a program - select Visual Studio
(version) -> right click select -> Modify -> select SDK and install. It will take some time to complete installation.

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I'm running Windows 10 Pro Insider Preview build 10130 and Visual Studio 2015 RC.
When I create a new solution using the Blank App template and try to run it, it fails with a message: Unable to activate Windows Store app ''. The activation request failed with error 'The wait operation timed out'.
Any ideas what could be causing it?
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there was an error attaching the debugger to the role instance

I am getting an Exception when I am trying debug my application on Emulator (Web Role).
you can see exception by clicking following link
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Hope it might help others.
I Also had the similar problem and I restarted PC and **Run Visual Studio as Administrator**.
And let Visual Studio start the emulator with same privilege resolved the issue.
I was using Visual 2013 and Web API application under IIS Express.
Do you have IIS added? Most likely it's already installed but you've to enable it via Add Windows Compoenents on Control Panel...
I had this same issue all of a sudden, luckly I remember changing the ServiceDefinition.csdef file. I rolled this back to an earlier version and the debugger ran again correctly. The only thing I changed in the 'broken' version was instance size from small to medium.
Go to visual studio installer(search it from window's start)
and update the visual studio.
After updating, hit modify
button, after that on right side you will find a box named
debug (or something like that), select that box
Then hit install.
Restart your visual studio and debugger will start working.
In my case it worked perfectly.

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