When trying to log in, you get the following error:
Run the Remote Desktop as administrator.
Go to the local computer files and go to C:\Program Files\SAP\SAP Business One\Conf\b1-local-machine.xml. You can replace that .xml file with a copy of it from another computer where SAP is working.
If that doesn't work, Delete the SAP folder under the user/local. When you launch SAP again, it will recreate that folder and it's contents.