There is no official “SXUptp” driver signed and distributed by Microsoft for Windows 11. However, generic free drivers (specifically CDC ACM or Prolific PL2303 variants) often work. Success depends entirely on the specific USB VID/PID (Vendor/Product ID) of your device. Users may need to disable Driver Signature Enforcement (temporarily) or use a legacy free driver.
Silex provides legacy drivers for their USB Device Server products. The sxuptp.sys file is bundled in their SX-USB_Series_Driver_v3.0.0.0.zip.
Date: Current (2026) Subject: Analysis of Free Driver support for "SXUptp" hardware on Microsoft Windows 11.