The main use of Microsoft .NET Framework 1.1 Service Pack 1 (SP1) is improved security. SP1 provides better support for consuming WSDL documents, Data Execution prevention and protection from security issues such as buffer overruns. SP1 is available in 22 languages. This supports all Windows Operating systems from win98 to windows vista. Microsoft Internet Explorer 5.01 or later must be installed in your system.
Download Microsoft.Net Framework 1.1 SP1