When I attempt to launch Firefox, I get a message indicating it is already running and either needs to be closed or I need to restart my computer. It's not running and restarting does nothing to fix the problem.

I am running on a laptop, with Windows Vista OS. There is nothing in the active tray relating to Firefox and I made a point of closing out both my Last Pass Vault and all open tabs in Firefox before shutting down the night before.

I can access the net through aol and internet explorer, but want my Last Pass vault back!