During an installation the Symantec Installation Manager stops with errror message that the IIS script maps for ASP.NET are missing or misconfigured. This occurs at the Installation Readiness Check. The option to automatically install and configure ASP.NET for IIS appears to run an update or install when selected but the readiness check runs again with the same error.
If this is a new installation of the Platform run the following to resolve the issue:
1. Remove and reinstall of the windows role and features.
Go into the Server Manager for Microsoft windows and remove all of the roles and features including dependent items. This will require multiple restarts of the server.
2. After the successful removal of roles and features then go into features and add .Net Framework 3.5.1
a) select to add required roles and services.
b) Verify that the Windows Process Activation is selected to install and select the next button two times and you will come up to a screen to select role and services. On that screen make sure that Aspnet is selected and that you add the required role services of 'Asp' and 'Management Tools' (making sure that all check box items under Management Tools are selected). Select next and Install.
If additional roles and features are needed they can be installed later.
3. After the removal and reinstall the installation should be able to get past the prerequisites for aspnet.
If this is an SMP or Solution update and virtual folder information is already present it will be necessary to make sure that the IIS configuration is backed up/exported prior to removing the IIS roles/features since that will remove existing application virtual folders in IIS.
SMP 7.1 SP1