If a message displays stating Unable to find script library ‘/aspnet_client/system_web/2.0/WebUIValidation.js'. Trying placing this file manually, or reinstall by running ‘aspnet_regiis -c'. the aspnet_regiis.exe file must be run from the following location: c:\windows\Microsoft.NET\Framework\v2.0.20727\aspnet_regiis.exe.