Microsoft Net Framework 1.1 Service Pack 1 64-bit __full__ Download Here

If the .MSI fails, apply the registry workaround:

| Error Code | Meaning | Solution | |------------|---------|----------| | 0x80070643 | Fatal error during installation | Uninstall any existing .NET 1.0/1.1 first using dotnetfx_cleanup_tool . | | 0x643 | Component not registered | Run regsvr32 %windir%\system32\mscoree.dll before installation. | | 0x8004E032 | 64-bit mismatch | Your Windows is 32-bit, use the x86 SP1 package instead. | | 0x80070005 | Access denied | Disable antivirus and Windows Defender Real-time Protection temporarily. | microsoft net framework 1.1 service pack 1 64-bit download