| Problem | Solution | |---------|----------| | “Setup failed due to missing prerequisites” | Install .NET Framework 3.5 and Visual C++ Redistributables. | | SID file expired | Request a new SID from your institution or SAS support. | | SAS won’t launch after install | Run SAS.exe as Admin. Check Windows Defender/AV exclusions. | | Download is slow | Use Download Manager (resume support) and avoid peak hours. |