Abstract: A method of launching an application in a computer system, the method comprising launching the application in a restricted user account, intercepting at least one request for an operation on a file, the at least one request comes from launching the application, determining whether the at least one file operation request is acceptable, and responsive to the at least one file operation request determined to be acceptable, forwarding the file operation request for the operation on the file on behalf of the application launched in the restricted user account.

Abstract: A computer application is run within a restricted user account including permissions to access contact information for at least one computer system. If a computer virus infects the application, the application uses the contact information to send a message to only authorized computers including the at least one alert computer.

Abstract: A method for accessing a file for editing includes limiting access permissions of an application to one or more directories including a first directory and receiving a request to edit the file stored in a second directory using the application. The second directory is not included in the one or more directories available to the application. The file is copied from the second directory to the first directory.