The following error is displayed on launch, when Toad is installed on Windows 8.1
"Toad encountered a serious error and must be closed.
Please urgently save your data and close the application.
Apologies for inconvenience.
COMException Unknown error.
Stack Trace: at System.Windows.Forms.AxHost.OleInterfaces.System.Reflection.IReflect.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParameters)"
.NET Framework 4.0 (client and extended) is installed.