What Is a USB Printer Port?

USB printing refers to a printing device with a USB interface type. The interface for connecting the printer cable to the computer is a USB type, which generally has the characteristics of direct plugging and easy use.

USB printing

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USB printing refers to a printing device with a USB interface type. The interface for connecting the printer cable to the computer is a USB type, which generally has the characteristics of direct plugging and easy use.

Chinese name

USB printing

Belong to

USB

Features

Flexible insertion and easy operation

Types of

print

USB printers are favored by more and more office users due to their advantages such as flexible insertion and easy operation. In order to make better use of USB printers, many people use their brains and go around, and continue to carefully study and figure out how to use it in their work. With the help of these classic techniques, USB printers are becoming more and more convenient to use. Of course, there is no limit to use, and the pursuit is endless. In the process of frequent contact with USB printers, there will be more and more detailed techniques being dug up and summarized by others; this is not the case. The few USB printers provided below in this article are new. Summarized in continuous practice, I hope these contents can make everyone refreshing.

Beware of incomplete prints

Recently, when using a USB interface printer to process materials, it is often found that the printed content is "lacking arms and legs", which was originally thought to be caused by a virus. However, after removing all viruses in the system and printing the material again, it still returned. This kind of incomplete print appears, what is going on? In fact, this phenomenon is mainly caused by the incomplete content of the file transmitted by the computer system to the printer. Considering that the Windows system has opened a "cache" processing function for USB printers, when the printer is printing some large-capacity materials, because the printer prints materials at a slower speed, it is easy to appear on the screen to indicate that the printing has completed, and The printer is working. If you unplug the USB printer directly at this time, it is easy to cause incomplete printing. In order to avoid this phenomenon, you are better to unplug the USB printer safely by unplugging the hardware in the system tray window when you unplug the USB printer.

Show hidden USB printers

Maybe you will be surprised to see such a title, how could a USB printer be hidden by the system? In fact, in the operating system of Windows 2000 and above, if you have installed the driver of the USB printer beforehand, but the printer is not connected to the computer, then in the device manager window of the system, you will not see To the "shadow" of a USB printer. So how can we make the USB printer icon appear in the device manager window of the system? To achieve this, you can modify the system's registry as follows:

Click the "Start" and "Run" commands on the system desktop in turn to open the system's run settings box, enter the registry editing command "Regedit", click the "OK" button, open the system's registry editing interface, and use the mouse Expand one by one of the registry branches HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Session Manager \ Environment, as shown in Figure 1.

USB printing

USB printing

In the right sub-window corresponding to the Environment branch, right-click a blank area, execute the "New" / "String Value" command from the pop-up right-click menu, and then set the name of the newly created "String Value" to " DEVMGR_SHOW_NONPRESENT_DEVICES ", then double-click the string value with the mouse, enter the number" 1 "in the subsequent value setting window, and finally click the" OK "button to exit the registry editing interface, and restart the computer system, so You can see the "shadow" of the USB printer in the system's device manager window.
Coincidentally does not listen to USB printers

When connecting the USB interface printer to the Windows XP operating system, I found that the printer always does not listen when the system is successfully started for the first time. You need to unplug the printer's USB interface and reinsert it into the computer before using it. When the USB printer is back to normal, what is going on? When encountering this phenomenon, you may wish to follow the steps below to quickly troubleshoot:

First plug the USB interface printer into another computer that can work normally, and see if the printer itself is faulty; if the printer itself is normal, then you may wish to plug the printer's USB interface into another computer's USB port, see See if the printer is not listening due to the computer port.

If your computer uses a motherboard that supports the USB 2.0 interface specification, you may wish to reinstall the USB interface driver that came with the motherboard in the Windows XP operating system, and then reinstall the print driver that came with the USB printer.

If your computer contains multiple USB interfaces, you may wish to unplug all other devices in the temporarily unused USB port, and then let the USB printer work alone to see if it is caused by the insufficient power supply of the USB interface. The printer does not listen. I believe that through the above exclusion, your USB printer will be able to be "tamed" by you.

USB printer is completely disabled

In order to prevent others from using their own USB printer while they are away, you can use clever settings to make it impossible for anyone to use the USB printer in the local computer. Even if other people uninstall the printer and then reinstall the printer, You cannot use a USB printer. To do this, you may follow these steps step by step:

Click the "Start" and "Run" commands on the system desktop in turn to open the system's run settings box, enter the registry editing command "Regedit", and click the "OK" button to open the system's registry editing interface.

Use the mouse to expand the registry branches HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ USBHUB one by one, as shown in Figure 2;
In the right sub-window corresponding to the "usbhub" branch, select the "Start" sub-key and double-click it with the mouse. In the subsequent value setting window, enter the number "4", finally click the "OK" button, Restart your computer system so that any USB printer installed on your local computer cannot be used at will. Of course, this method is only applicable to Windows 2000 and Windows 2003 systems. Corresponding to Windows XP operating system, you can expand the registry branch HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ USBSTOR in turn, and then the "Start" sub-branch under the "USBSTOR" branch. The key value is also set to "4". Finally, restart Windows XP.

USB printing

USB printing

Restrict specific users from installing USB printers

If you want to prevent some special users from installing USB printers, but can install printers with other interfaces, and other users can install USB printers at will, how do you do that? In fact, to achieve this, the first thing to do is to prevent specific users from installing USB printer drivers. To do this, it's actually very simple. You just need to follow the steps below:

First open the system explorer window, and expand the Windows folder and the inf folder in turn. In the inf subfolder window that appears, select a file named "usbstor.inf", and then right-click Click on this file and execute the "Properties" command in the context menu that opens.

In the pop-up "usbstor.inf" file property setting dialog box, click the "Security" tab, and in the corresponding tab page, select the user account that needs to be restricted (as shown in Figure 3); In the permission list box below, set the "Full Control" permission to "Deny", and finally click the "OK" button.

USB printing

USB printing

In the same way, in the inf subfolder window, right-click a file named "usbstor.pnf", and then execute the "Properties" command from the pop-up right-click menu to open the "usbstor.pnf" file. Properties setting dialog box; then enter the "Security" tab page of the dialog box, select the user account that needs to be restricted, and then set the "Full Control" permission for the account to "Deny". It is worth noting that in order to achieve the above limited purpose, the computer system where the USB printer is installed must use the NTFS file system format.