I googled probably the whole web but didn't find an answer that would help.
Every new USB plugged printer is recongnized only as uknown device, even after indicating the exact path of the original printer driver. The others installed printers work, just as adding a network printer. Adding a new usb printer results in an error code 28 or error message that the driver has been found but the USB-Printing support is missing.
Adding any other USB devices is ok, only the printers have the problem. Any solution - maybe via cmd?
W7 Home premium 64 Bit