While creating Web Setup, Visual J# .NET automatically included in the MSI package.
When we install this MSI on a server machine which does not have Visual J# .NET installed, installer prompts a message to install Visual J# .NET.

Usually we dont need to install Visual J# .NET and it can be avoided to add into installer. To do this:-

- Open setUp project (.vdproj) file in a text editor.
- Find below section for LauchCondition for Visual J# .NET and remove it.
"LaunchCondition"
        {
            "{836E08B8-0285-4809-BA42-01DB6754A45D}:_237E8F40F1A4464FBD27D8992CFDD623"
            {
            "Name" = "8:Visual J# .NET"
            "Condition" = "8:REQ_VJSLIB_VER_PRESENT = \"TRUE\""
            "Message" = "8:[VSDVJSMSG]"
            "InstallUrl" = "8:http://msdn.microsoft.com/vjsharp"
            }
            "{836E08B8-0285-4809-BA42-01DB6754A45D}:_DF1CA2119CD64D4B94CE993CF1624ACE"
            {
            "Name" = "8:IIS Condition"
            "Condition" = "8:IISVERSION >= \"#4\""
            "Message" = "8:[VSDIISMSG]"
            "InstallUrl" = "8:"
            }
        }
- Save .vdproj file and Build again to generate new MSI installer.
- Install the MSI on a new machine again where J# does not exist, It should not prompt the same message to install J#.