Security update for Microsoft.NET Framework 1.1 SP1 on Windows XP - Microsoft Community

Uninstall .NET Framework 1.1. Then download the .NET Framework Cleanup Tool From the drop-down box, select 1.1 and clean. Reinstall .NET Framework 1.1 Download and install .NET Framework 1.1 Service Pack 1 Visit Windows Update or Microsoft Update ...

answers.microsoft.com