: Reboot Windows 11 to ensure the system registry loads the new virtual bus driver. Fixing Common Windows 11 SXUPTP Errors
The main issue is that the SXUPTP driver was last updated by Silex in 2017 for Windows 10. Because of this, on many Windows 11 systems, you'll encounter the following error message:
If you have plugged in a —often used for connecting printers, scanners, or USB dongles over a network—you may have encountered issues with the sxuptp.sys driver on Windows 11. Specifically, as of late 2025 and 2026, users have reported that old drivers fail to load, leading to a "code 39" or a blue screen (BSOD).
Extract the zip file and run Setup.exe . The installation wizard will automatically inject the free SXUPTP driver into your Windows 11 system core. sxuptp driver windows 11 free
) to end any associated Belkin or Silex background processes before attempting a reinstall. Microsoft Learn Safe Download Sources
Windows 11 features a security setting called Core Isolation that blocks older drivers.
Boot Windows 11 into Safe Mode, open Device Manager, right-click the SXUPTP device, and click Uninstall device . Ensure you check the box for "Attempt to remove the driver for this device." Download the absolute newest utility version from Silex to replace it. Issue 3: Device Server Not Found : Reboot Windows 11 to ensure the system
To ensure that the SXUPTP driver is installed correctly and running:
: A popup states a driver cannot load because of Memory Integrity.
Once the installation finishes, restart Windows 11 to allow the system to initialize the virtual USB root hub. Troubleshooting SXUPTP Errors on Windows 11 Issue 1: "Driver Blocked due to Memory Integrity" Specifically, as of late 2025 and 2026, users
in Windows Security to allow the driver to load, though this reduces your system's security. Windows Security Device Security Core isolation details Memory Integrity Restart your computer. Microsoft Learn 2. Manual Installation via INF File
Many SXUptp chips use a cloned Prolific PL2303 HXD (Rev A) chipset.
Warning: While you can turn off Memory Integrity in Windows Security to allow old drivers, this reduces system protection. Conclusion
: Before manual installs, visit the Silex Technology Support Page or the Microsoft Update Catalog to see if a newer version is available that supports Windows 11.
If the manufacturer is defunct or you cannot locate the original CD, some trusted free driver repositories can help. scam sites that ask for credit card info or a “subscription.”