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"An instance of the program already running Seems to Be" in Netbeans

I am currently using Netbeans 6.7.1 to develop a Swing application and I like the Matisse that comes with this IDE. But there have been several occasions when the computer is turned off abruptly, which has caused Netbeans not close properly, and then restart and try to reopen the IDE shows me a alert box with the message: "An instance of the program Seems To Be already running with your user directory. Either a previous session of the program Did not exit Correctly, or Another instance of the program Different is running on a computer and using the Same user directory. "If Another session of the program is running with the Same user directory, please click Cancel to Prevent the Corruption of the user directory. If You are sure That No Other instances of the program Are running with your user directory, click OK to continue. "
To solve this problem we must bear in mind that different stores Netbeans configuration folders, these are the installation directory, user directory and project directory. Well, to solve this problem in particular the only thing I did was delete the file lock found in the user directory, in my If C: \\ Documents and Settings \\ Jorge Ruiz \\. netbeans \\ 6.7 \\ lock
commented folders are created during installation of Netbeans and the user can modify them, therefore it is important to read the dialogue before making Click the Next button of the facility. For more information about these folders you can read the blog Netbeans support . I hope that the outcome of my case will serve ...