Hello, have 2 PC's with the same problem. Want to instal Canon LBP-3010 printer on both and when trying to install can't select from a list the USB001 virutal port (missing from list), tried to reinstalll driver for printer itself, chipset driver, manually replased usbmon.dll and usbprint.sys from other good working PC. The printers are new, installed the same printer on other PC's works fine. they are running on Windows XP Home Edition. Any help will greatly appreciated.