Dell have also created a set of USB drivers for NT4, which have been reported to be working well with many USB devices. I have a windows tablet which can still connect to the printer and prints fine but with limited capacity because of the tablet size. Windows NT 4.0 doesn't have native USB support, but with these free USB drivers it is possible to use USB-keyboard, -mice, -flash disk with that old horse of an operating system. I am at the end of my tether I need the printer for work, I don’t know what to do, I can see other people are having the same issues. I phone Microsoft and they said “its HP’s problem they know they’re driver’s need to be compatible”. I phoned HP and had an attitude that I don’t care its Microsoft’s problem. I tried the original disc when I first installed the printer with no problems but still the same error. I have tried all the suggestions on HP support site also on Microsoft. (The Printer drivers not compatible with a policy enabled on your computer that blocks NT 4.0 drivers). I never had a problem with the printer until the drivers were changed and Windows 10 Home 64 bit updated around June 2017, the printer stopped connecting to the laptop with the error message I have a HP Envy 4520 All-in-One Printer just over a twelve month old.
