Hi, The windows error message , that it is unknown device would prompt you for general fixes, without knowing that the device is at fault electronically, for eg, my printer memory contained in the board chip failed leading to this behaviour. It was explained to me by a tech guy.
So, either replacement of the boardchip with memory or replacement of printer is the only way out.
I opted for the second, as my printer is older and would no longer work that much efficiently.
I want recommendation of inkjet printers having colour and black with refill possibilities. The tech guy also tried the same step.
I even went one step further by going to event viewer , application and service logs, microsoft, windows, print services, and enabled the operational log. When i issue the command print, it just stores in spool as print job, nothing further .... Failure of hardware device part. This log creation is a new thing i tried. it gives you operational log for all the device and services in windows.
You have to enable each or the logs for which you want , by going there and right clicking and select enable. These logs are disabled by default.
Microsoft could not be showing hardware failure of internal failure , as devices are so much.