This error indicates a problem with your computer, not the installer.  This problem is outside the scope of LENA technical support.

Please enlist the help of your own IT support.

Some possible places to start are listed below:

1. Reinstall Microsoft .NET Framework
2. Perform a Full Virus Scan
3. Full Scan your Registry
4. Reregister Windows Installer
5. Check System Files for Corruption
6. Clean the System Junk