Infineon (Cypress) Developer Community
Instead, you need to download the from the manufacturer. This will install cyusb3.sys along with its supporting files correctly. Where to Safely Download the Driver The driver is part of Cypress/Infineon's "SuiteUSB 3.0" or the "EZ-USB FX3 SDK" . cyusb3.sys driver download
cyusb3.sys is a core system driver file for Cypress (now Infineon) FX3 USB 3.0 SuperSpeed controllers . You cannot (and should not) download this single .sys file alone from a "DLL download" website. Those sites often distribute outdated, incorrect, or malware-infected files. Infineon (Cypress) Developer Community Instead, you need to