Note: This was originally posted by an inactive account. Content was preserved by moving under an admin account.
This seems to be related to your other post regarding having an issue running Dataverse alongside Lavastorm. After reinstalling, did you modify the port numbers as described in that response or did you stay with the standard ports?
If you haven't modified the ports, let's make sure the Lavastorm install colliding with the Dataverse ports. Could you please confirm that Lavastorm is not running in the background? There is typically a little green circle located within the task tray (near the clock) to indicate that it is running. Right click on that and choose to exit if it is running. Once that has exited, please restart the Dataverse services and try and open Dataverse again.