The X550 is a PCI-card-based "zero client" and does not support Windows 10 or Windows 11. Google Groups Installation Steps for Windows 7 “X550 and X350 vSpace 6 Software Release X-6.2.3.6”
Given the age of both the X550 and Windows 7, many organizations are migrating. Here are viable alternatives. ncomputing x550 software for windows 7