Windows 10 will often block the installation of the X550 PCI card drivers because they aren't digitally signed for the modern OS.
However, hardware is only as good as the software driving it. If you are reading this, you likely have an X550 card sitting in your hand or installed in your machine, and you are facing the critical challenge of making it work with modern operating systems. ncomputing x550 software for windows 10
Despite best efforts, the “NComputing X550 software for Windows 10” combo can misbehave. Here are known issues and fixes: Windows 10 will often block the installation of
Being a PCI card, you need an older motherboard with an available slot. ncomputing x550 software for windows 10
Avoid third-party “driver downloader” sites. Many contain malware disguised as NComputing X550 software. Always verify MD5 checksums from official sources.