I was having this problem, --> "POLINK: fatal error: Access is denied.", when I tried to build a project.
At first, I had to restart the computer in order to make it go away.
I am using Windows 7.
There is another way you can fix it.
You have to open the Windows Task Manager.
There are two tabs in the task manager that you need to look at.
In the Applications tab, make sure that a previous build of your application is not running, if it is, force it to stop.
But the key to not getting the error message is under the Processes tab.
Even when you have forced your application to close, my experience is that the Processes tab will indicate that your .exe file is still running.
Force it to end there, and then you will be able to re-build your project.
Dan