id summary reporter owner description type status component version resolution keywords cc guest host 9383 Could not load the Host USB Proxy service: VERR_NOT_FOUND -> setup issue Bryan Moffit "USB not working with my Linux host using VB 4.0.12-72916. I have the updated extensions pack installed (version matches current VB version). My user is in the vboxusers group (and has logged out and back in again). USB was working with the same user and settings using VB 4.0.9. Here's the error box message that appears when I click on ""Settings"" for the Client machine in the GUI: {{{ Failed to access the USB subsystem. Could not load the Host USB Proxy service: VERR_NOT_FOUND. Result Code: NS_ERROR_FAILURE (0x00004005) Component: Host Interface: IHost {35b004f4-7806-4009-bfa8-d1308adba7e5} Callee: IMachine {662c175e-a69d-40b8-a77a-1d719d0ab062} }}} My host machine: 64bit SMP RHEL5.7 (kernel 2.6.18-274.el5). I'm hopeful that this isn't a dup of another ticket... I didn't see any with the same ""VERR_NOT_FOUND"" and ""Host USB Proxy""." defect closed USB VirtualBox 4.0.12 obsolete VERR_NOT_FOUND USB Host Proxy Linux Linux