Why don't the USB ports work? The USB port on the laptop does not work: what to do

It is recommended to disable USB ports as a precaution, namely when connecting flash drives, external drives or other USB devices in order to infect the computer with all kinds of viruses or steal data. It is for these reasons that many IT workers in offices and companies block access to them. Without bothering with any programs for these purposes or other settings, they simply disconnect it from the motherboard.

Below I will give some examples with descriptions, how to disable USB ports on a computer.

Disable USB in Bios

We go into Bios, to do this, when turning on or restarting the PC, press the Delete key on the keyboard. Let's go to the Advanced section (Advanced BIOS features), where we are interested in the next option, Legacy USB Support. By default, it has the Enabled position, change it to Disabled.

Save the changed values by pressing the F10 hotkey and exit.

Via the registry

Using +R, open the Run window and enter the Windows command “regedit” (without quotes). In the editor we go along the branch

Microsoft Registry

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR

Find the DWORD parameter “Start” and change its value to “4”.

We reboot by first clicking the “OK” button.

PS: How to enable USB ports? Change the value back to "3".

device Manager

Open the “Start” menu, right-click on “Computer” and go to “Properties”. On the left side of the screen, click on the “Device Manager” link. In the displayed list, look for the “USB Controllers” item, open it and use the mouse to deactivate it.

Going to "Properties".

Then “Drivers” and then click the button shown in the screenshot below.

Removing USB controller drivers

An option that also has a place to be. Simply use a program, for example, CCleaner, to remove drivers from your computer. The downside is that when you restart the PC it will check for the presence of these and install them. Which will again open up access to the ports.

Fix It utility

You can download and at the same time find out how you can use it to deny access by following this link //support.microsoft.com/ru-ru/kb/823732.

Using programs

There are quite a lot of applications, it’s impossible to list them all, but I would like to use one. Its name is USB Ports Disabler. Download from the link. We launch and then everything is intuitive.

First, click the button highlighted in the figure below

A number of laptop users may encounter a situation where USB ports on laptop not working, and devices connected through them are not recognized by Windows. This problem occurs quite often and can have many causes, making it difficult for the user to work with the USB devices he needs on his computer. In this article I will tell you why USB ports on a laptop do not work, what are the reasons for this phenomenon and how to fix it.

Causes of the problem when USB ports on a laptop do not work

So, why did the USB ports on the laptop stop working? The reasons for this dysfunction may be the following:

How to fix non-working USB ports

In order to fix non-working USB ports on a laptop, you need to do the following:

Restart your laptop. It is recommended to turn it off completely, remove the battery for a few minutes, then put it back and boot the operating system again;
Inspect the USB connectors of your laptop, if necessary, clean them from dust using a regular wooden toothpick;
Try connecting your device to another USB connector; perhaps the first connector is no longer functioning;
If you are connecting your USB device via a cable, try changing the latter, this may help the problem when the USB ports on the laptop do not work;
Make sure that the connected USB device works; to do this, connect it to another computer;
Go to BIOS and make sure that the USB functions are enabled;
Manually recognize USB devices using the system. Click on the Start button, type devmgmt.msc in the search bar and press enter. Device Manager will appear in front of you, click on the name of the list of devices at the top (usually the name of your computer), click on the “Action” tab, and select “Update hardware configuration” there. If the system finds USB controllers during this procedure, then your problem can be solved;
Remove and then reinstall the USB controllers. Go back to Device Manager as described above, find “USB Controllers” there, and double-click on this entry. A list of USB controllers will open in front of you, right-click on the first one and select “Delete”.
Similarly, delete all controllers in the list. Then restart your PC, these controllers will be automatically installed by the system again, this can help fix the problem when the USB ports on the PC do not work;
Reinstall the drivers for the USB. Usually, the laptop comes with a disk with drivers, including a USB driver; you just need to install it on the computer and the problem will be solved. If your USB connection is highlighted with a question mark or has the status “unidentified device”, then you need to find out the ID of your device, and use this ID to search for drivers on the network;
If you have several USB devices connected, then try disconnecting them and leaving only what you need at this moment;
Download and run a special utility from Microsoft, it can help fix problems with USB if the USB ports on the laptop are not functioning;
Perform a system rollback to a previous working restore point. Click Start, type rstrui in the search bar and press enter. Find a restore point at which the system worked correctly and perform a rollback;
If all your USB ports do not work, and the above methods did not help, then perhaps your south bridge has burned out. Its replacement (or warming up) is carried out at a service center using special equipment; contact them for advice and assistance.

Video solution to a situation where the USB port does not see the device

In this material, I examined a situation in which the USB ports on a laptop do not work, listed a list of reasons for this dysfunction and provided a number of tips for solving it. If you do not know what exactly caused these problems with USB ports, then consistently follow the entire set of tips I have listed, this will help to effectively solve the problem with malfunctioning USB ports on your PC.

The presence of USB ports on devices has become firmly established in the life of the modern consumer. Therefore, when the USB ports on a laptop or PC do not work, obstacles to comfortable work may arise. A non-functioning port can interfere with the functioning of a printer, scanner, as well as all kinds of external storage devices.

Rules for using ports

First of all, to prevent connector damage, it is recommended to follow a few simple rules:

Avoid connecting devices with noticeable damage to the port or housing, burning odors, or other signs of operational failure to the USB connector;
do not overload the ports by resorting to all kinds of multipliers and tees;
touch the computer case before working with USB. This will remove static electricity, which is the most common root cause of breakdown.

When purchasing equipment, the warranty often does not cover USB ports. This is due to the high probability of their breakdown by inexperienced and careless users who do not believe that working with a laptop and especially ports needs to follow any rules.

Factors leading to malfunctions and ways to solve them

To quickly and most effectively eradicate the problem when USB ports on a computer or laptop do not work, it is enough to understand exactly why the port does not work. The main causes of failures and breakdowns are:

Hardware obstacle

This could be dust, damage to the external cable or the controller itself, an unconnected block, lack of power, and others.

The above problems can be solved using:

replacing broken components in a laptop or computer;
checks to see if all parts in the system unit and laptop are connected and working correctly;
systematically maintaining the cleanliness of the laptop and other actions related to the technical side of the issue;

Obstacle in the software

Since the device communicates with the operating system using drivers, many problems can be caused by their inoperability. In this case, some simple methods can help:

disabling the controller through device manager. Another method related to the manager could be to disable the controllers by removing them and then rebooting the device. The controllers will be reinstalled and the ports will work;
driver update. If there is a defect in the drivers, you can find new ones and reinstall them. Installing the correct driver will solve the problem and everything will start working. A problem often arises when, after updating drivers for other components, USB ports do not work. Then you need to determine: the problem is with the drivers for the device using the connector, or directly in the effectiveness of the port itself. In the first case, installing an updated driver will help, in the second you will need to look for where exactly the breakdown occurred: the south bridge, the motherboard or something else and solve exactly this problem;
disconnecting other USB devices. Ports become disconnected due to overload and lack of power. In this case, stopping other devices operating via USB will help.

There is also a reason why the USB port specifically on the motherboard of a laptop or computer does not work. It is quite possible that there is a short circuit on it. This can be avoided by systematically cleaning it from dust, checking that it is firmly secured and not loose, and removing static electricity before work. If the ports on the motherboard stop working gradually one at a time, then you need to prepare to change the board itself. Since, perhaps in the next six months, it will stop working.

A temporary work solution can be a PCI USB controller. However, if the south bridge burned out, this will not help. With this option, the only option is to go to a mechanic to replace the bridge. It is impossible to fix such a malfunction on your own, due to the fact that replacing a bridge is a complex and time-consuming job that requires specialized tools and skill.

Control programs

An assistant in diagnosing USB operation for the user can be special programs designed to identify all connected devices and their status. It is in the program that you can see which device “conflicts” with the equipment, which will significantly reduce the amount of time spent searching on your own. You can find these programs yourself on the Internet; they are freely available, free, and their selection is quite large. Here are some of them (the download link is in parentheses):

USB Manager

USBDeview

Advanced USB Monitor

USB Watchdog
There are also programs that can block all USB ports. One of them is USB Watchdog.

Most often, users resort to them if important information is stored on the PC hard drive, to which access should be restricted. Additionally, such blocking will allow you to avoid malicious software that may be located on the drive inserted into your computer or laptop.

In large enterprises and offices, information leakage from laptops can be prevented using a program that, when using a port, will execute a script programmed by the system administrator. In this version, the program works as a “watchman”.

Repair

If the USB ports on your computer or laptop still stop working and nothing helps solve the problem, then the connectors need to be replaced. You can do this yourself at home, or by contacting a specialized service, where specialists will work on it.

To replace the port yourself, you will need a soldering iron, rosin and a new connector. Naturally, you need to be able to work with a soldering iron, as well as knowledge about the structure of a computer, because it will need to not only be disassembled, but also put back together in the correct sequence. It is important to understand that in this case there is a chance of doing something wrong and everything will stop working. In the future, the services of a specialist will be required, and the cost of repair work will increase significantly.

Of course, repairing a laptop in a workshop will cost a little more than at home. But replacement services have various ports available, which can be selected taking into account the size of each specific computer or laptop. Also, the advantage of contacting a workshop will be a guarantee for the work performed, which will allow you to contact us again if the repair turns out to be of poor quality. In this case, the main thing is to take a responsible approach to choosing a workshop so that the money is not wasted.

In general, faulty connectors on laptops and computers are easy to fix. You can do this either on your own or with the help of a professional. Timely prevention of malfunctions will extend the life of computer or laptop components and avoid unnecessary repair costs.

Have a great day!

Hello, dear readers! Every time you start the computer, all devices installed in the computer are initialized, data about drivers and various utilities is read. But sometimes there comes a time when a device connected to a personal computer is not detected by the operating system.

It is at this point that we have an anxious moment and wonder why does not workUSBport? What exactly is the matter and what needs to be done to make the port work? In the end, as they say, there is a way out. But first, let's figure out how everything works and what the essence of this material is.

So, many of us use the USB port constantly when working on a computer, as if it is impossible to do without it, although in fact it is so. In computers, as you know, USB ports are present not only on the front panel, but they can also be seen on the front panel of the system unit case, for example in the card reader.

So, at present, the USB port is the heart of the system, so to speak, the exchange of information that can be transferred at any time to the PC system available at that time. I am already silent about the fact that using ports it is possible to enter data into a computer (mouse, keyboard). The location of ports on a personal PC is always different; it is worth adding that in advanced systems and gaming platforms, additional USB ports are installed.

As always, as it usually happens, one fine day a moment comes when the USB port does not work, that is, the USB port simply hangs, glitches, is not detected by the system, or rather, it does not work correctly. In today’s article, I suggest you consider the reasons, as well as solutions, for a non-working USB port.

We wonder why the USB port does not work?

Firstly, if when you connect a flash drive to a computer or some other equipment, the port does not work quite correctly or the device connected to the computer is not detected by the system at all, then in this case you should make sure that the controller on the PC motherboard is turned on .

Quite often, users forget to turn on the USB controller. It seems like a simple, but still common problem when the user starts the PC, but the device is not detected. It is possible to fix everything here; to do this, you need to go into the BIOS and enable the appropriate parameter. By the way, if you don’t know what a BIOS is, then I recommend that you definitely read the article

So, go to the BIOS and find the item “Integrated Peripherals - this applies to Award BIOS”, or to Ami BIOS - Advanced”.

Next, press “Enter” and go to “Onboard Devices Configuration” and make sure that the “USB Function” and “USB 2.0 Controller” items are in the “Enabled” position. If everything is so, then everything is included. Otherwise, the parameter can be turned OFF, position “Disabled”. If the option is disabled, you should enable it. Next, save the changes, then reboot the PC system and check the functionality of the USB port. Be sure to check whether the USB ports on the front panel of the system unit are connected to the motherboard itself using the so-called connector.

If the port still doesn’t work, then we move on.

Secondly, or maybe the problem is that the port is not working and is completely hidden in the USB extension cable? For example, there are situations when the computer does not recognize a peripheral device (printer), for the simple reason that the USB cable itself is simply damaged. The reason for cable damage can be very varied, for example, you accidentally placed a chair on the cable or some heavy object and simply pinched it. Therefore, do not be lazy to check the cable itself.

Third, it is quite rare to encounter such a problem when the USB port does not have enough power. I will give you a specific example. Imagine that you have connected a flash drive and a printer to the front of the system unit case in the USB connector. As a result, the operating system, when sending data for printing, informs us that the document could not be printed. In general, your computer simply does not see the printer. And if you restart the computer, the printer is detected by the system, and you can easily print a document. However, after a while, the computer again loses connection to the printer and the printer does not print. Do you know why?

This seemingly trivial problem at first glance is due to the fact that there is a lack of power for the USB port. As a result, the USB port refuses to function properly. Basically, such an incident associated with a lack of power occurs when connecting several devices to the front panel of USB ports.

Of course, not always, but such situations still occur. These USB ports are connected to the motherboard using a cable. In addition to transmitting data, this cable also powers the USB hubs themselves. It is possible that the power supplied simultaneously to two devices connected to the USB hub may not be sufficient. In this case, I can recommend that you connect the printer to the built-in USB port, which is located on the PC motherboard.

You can also change the CMOS battery on the board. It happens that the problem completely disappears after replacing the battery on the motherboard. What kind of battery is this and where it is located, you can find out in this article:

In general, if you have does not workUSB port, which is located on the front panel of the system unit case, then try replacing the USB hub itself. Who knows, maybe it is the one that is faulty.

You can also try plugging the cable into another USB connector on the motherboard.

Fourth, if the USB port controller, which is responsible for identifying and starting the device itself, has failed, then things are, of course, bad. There is, of course, the opportunity to take and resolder the controller itself on the motherboard, but this takes time, you need to have the controller itself, and, of course, the soldering station itself. From a time-cost point of view, it is not entirely advisable. Another option is to entrust it to specialists, although this also has its pitfalls, price, quality of work, as well as the competence of the specialist who specifically works on this problem.

Fifthly, peripheral and mobile devices may not be recognized on your computer due to the lack of drivers and special software. It cannot be ruled out that if you have been using your operating system for quite a long time and the system has not been updated at all, and in general the Windows build is not the original version, then in this case it may be that the drivers are considered outdated and therefore in the system Freezes happen all the time.

Sometimes Windows disables the USB hub altogether to save power. To prevent the USB device from being disconnected, you will need to do the following.

Open “Device Manager” by right-clicking on the “Computer” shortcut and selecting “Properties”.

After the Device Manager window has opened, double-click with the left mouse button on “USB Controllers” and expand the branch.

Now all you have to do is go to the root USB hub and in the “Power Management” section uncheck the box, as shown in the figure below.

At sixth, sometimes reinstalling the operating system helps fix the problem when does not workUSBport. Although, of course, first try to roll back the system to its previous state. Here is an article that will tell you how to do this:

Seventh, perhaps there is some faulty equipment in your system, which actually serves as an obstacle to the normal operation of the USB port.

This problem is very relevant in our time. After all, quite often users directly encounter this. So, there is a solution. USB ports on a computer may become stuck, contacts may short out, and many other additional problems may occur when working on a computer.

We find a way out of our situation, check all devices for connection and disconnection. You will need to disconnect all devices and connect one at a time, for example, connect the keyboard first and see if it works, then connect the next device, let it be a mouse and so on. Connect additional USB devices, if they don’t work, then the problem is solved or you need to look in peripheral devices, maybe there’s something shorting there, but who knows.

Eighth, they completely forgot to enable the serial bus controller in the device manager. There are times when you don’t pay attention to the operation of USB devices, turn on the computer, download music, listen and enjoy new works of art. True, everything comes unexpectedly, suddenly you need a USB device, and then there is silence, it doesn’t work. The thought immediately comes to mind, maybe the controller is not turned on, let me take it and check, it is so.

Each PC has a device manager that shows which devices are connected, whether all drivers are installed and updates made.

In general, I think that you probably already know that if any driver is missing, the system automatically marks it with a yellow exclamation mark, this means a malfunction, as a result, with two clicks of the mouse you open an additional window, information about the code is displayed here malfunction and the possibility of its restoration.

Ninth, if all of the above methods did not give a positive result, then I recommend that you install a USB PC controller on the motherboard.

If your computer has a low-power power supply, for example 300 W, then it is likely that the cause of all the troubles is hidden in it, install a more powerful power supply, say 500 W, and check if the USB ports are working.

Concluding today's article, I would like to say that it is not always possible to easily find the culprit of all problems, sometimes it is not enough to simply reinstall Windows to find out what really happened.

If there are no drivers for serial bus controllers and the controllers themselves are marked with an exclamation mark, in this case you should either install drivers for the controller, or you can remove all controllers and restart the computer. After the computer boots, the system will try to install them again, and perhaps all USB ports will work properly again.

So, to summarize today’s article, we can only note that if the USB port on the computer does not work, then the cause of all the troubles may lie in both hardware and software. In general, I have said everything I wanted to tell you about today.

How do you like today’s article and what can you add to everything said above? In the next issue you will find out =>