To install ASP.NET on Windows XP do the following:
- Click Start then Run.
- Type CMD and hit Ok.
- Navigate to your Microsoft .NET windows directory which is usually C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727
- Run the following commands aspnet_regiis -i and aspnet_regiis -c
- Load up your IIS Manager and enable ASP.NET on the site you want.