After we installed Windows 10 on an existing Point of Sale Version 12 installation, we received an error which prevented us from opening the Company file on all workstations and the Server as well. This simple fix needs to be run in order to resolve this issue. It is import to make this adjustment in the SERVICES section on the main SERVER, not the actual workstations.
As a workaround you may perform the following steps to access your data file in Point of Sale: