It is possible that you have .NET 4.0 or a higher version installed, but the VirtualTablet Server requires .NET 3.5 specifically. You may need to enable .NET 3.5 in Windows features or install it separately.
A high performance and easy to use ftp server software for Windows.
Run and manage FTP and SFTP servers through a web interface.
Begin enjoying the benefits of server virtualization for free.
It is possible that you have .NET 4.0 or a higher version installed, but the VirtualTablet Server requires .NET 3.5 specifically. You may need to enable .NET 3.5 in Windows features or install it separately.