Symptom
During installation of the tools for SAP Business One you may receive the following error:
Unable to Register web Service Encryption for COM Interop
Cause
SAP Business One Tools for TaskCentre requires that .NET framework 4.0 is present.
Resolution
Install .NET framework 4.0 (Full version NOT the client profile). After the .NET framework install has completed rerun the tools for SAP Business One installer.