Symptoms
When you try to install Microsoft Visual Studio Tools for the Microsoft Office System on a computer with Microsoft Visual Basic .NET Standard 2003 installed, you may receive the following error message:

Setup cannot detect the required version of Visual Studio .NET on this computer.Before you install this product, you must install a matching regional version of Visual Studio .NET 2003 or Visual Basic .NET 2003 Standard.
Resolution
This error may occur if all the following conditions are sequentially true:Visual Basic .NET Standard 2003 is installed on the computer.Microsoft Visual C# .NET Standard 2003 is installed onthe computer.Visual C# .NET Standard 2003 isremoved.You try to installVisual Studio Tools for Office.