If you ever get those applications that wont allow you to run more than one instance, try the following:
- Right click on “Computer” or “My Computer”
- Select “Advanced” or “Advanced System settings”
- Under Performance heading; select “Settings”
- Select “Data Execution Prevention”
- Select “Turn on DEP for all programs and services except those I select.
- Select “Add” and add the required programs to the list.
- Hit Ok
Hope that helps!!