This problem widely used on laptops and computers that have USB ports version 3.0. Immediately after installing Windows 7 or another version of the operating system, one or more ports may not work. In this article we will look into the reasons and also tell you how to restore the operation of all USBs.
Reasons why USB ports may not work
If you are sure that before Windows reinstallation All USB ports worked on your computer or laptop, and then stopped, then the most likely reason is the lack of controller drivers responsible for USB operation connectors.
However, some ports may work, namely the USB 3.0 ports (blue) do not work.
To make sure that the problem is in the drivers, you need to go to the device manager and look for devices without a driver. Typically such devices are designated exclamation point or a question mark.
To go to Device Manager in Windows 7 you need to click right click mouse on the “Computer” icon and select “Manage” from the menu that opens.
Go to Device Manager from the Computer Management window
All devices on your computer will be displayed on the right side of the window. Among them there must be at least one device with an exclamation mark or a question mark.
Missing USB controller driver
How to fix the problem?
The solution is obvious - you need to find and install drivers USB controller 3.0. But to find drivers for it, you first need to determine if you have not a laptop, but a desktop computer.
Once you have found out the exact model of your device, you need to download drivers for USB from the official website.
To do this, write the phrase “<модель ноутбука>drivers" or "<модель motherboard> drivers".
It looks like this:
Go to the manufacturer's official website to download the driver
You need to go to a site whose name contains the name of the brand of your device (asus, acer, samsung, hp).
If you didn’t immediately get to the section with drivers, they are usually located on the “Support” or “Downloads” page.
USB Driver
USB drivers are most often found in the USB or Chipset section.
After the driver is downloaded, you need to install it and restart the laptop. Non-functional USBs should start functioning normally again. If this does not happen, we advise you to read the article.
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Peripheral devices such as a mouse, keyboard, Web camera, and printer are usually connected to the computer via USB ports. In this case, it often happens that one or more ports stop working. That is, when you connect, for example, a flash drive to a computer, it is not recognized, the keyboard or mouse may freeze, and the printer may not respond or print pages.
There are several probable causes where some or all of the USB ports on the computer do not work. Let's try to understand this issue and find out what should be done to restore normal functioning of the computer.
Checking BIOS settings
The first thing you should pay attention to is the settings Computer BIOS. To enter the BIOS you will need a working keyboard. If the keyboard is connected to the computer via USB and it does not work, then you need to connect a keyboard with a PS/2 connector. Otherwise, you simply won't be able to do anything.
So, let's go into the BIOS, for which, when starting the computer, you need to press the enter key, usually DEL. There may be another key that appears on the screen and is listed in the motherboard manual. After entering the BIOS, find the section responsible for integrated devices (Integrated Peripherals) or the “Advanced” section. Here you should find the “Onboard Devices Configuration” subsection. It contains the parameters responsible for the operation of USB controllers: USB Function or USB 2.0 Controller. These parameters must be Enabled. And if one of them is disabled, then hover over it and press Enter, thereby enabling it. To ensure that the changes you make are not lost, you must save them by pressing F10 and confirm saving by pressing the Y or Enter key.
After restarting the computer, check if the USB ports are working. And if not, then you should look for the reason elsewhere.
USB ports on the front of the computer do not work
As a special case, USB only on the front panel may not work for you. In such a situation, you need to check whether the necessary connectors on the motherboard are connected and whether the wires are damaged. To do this, open the side cover of the system unit and pay attention to the connector at the bottom of the motherboard. On the board itself there is an inscription USB1 or USB2, as well as on the block itself. The wires from the block go to the front panel, and if they are disconnected or broken in one place, then you have discovered the cause of the malfunction. Damaged wires should be connected or replaced. It would also be a good idea to check the contact in the connector on the motherboard. It is also worth paying attention to the board located on the front panel. Perhaps there is short circuit By the way, such a short circuit can be caused by accumulated dust. So be sure to clean system unit from dust.
Problems with the device itself or the cable
The next source of problems with USB may be the cable with which, for example, the printer is connected. This fault is easy to identify and fix. We connect the flash drive to the connector being tested. If it works, then we try to connect another known-good equipment, for example a USB hub, using a suspicious cable. If it also refuses to work, then the reason is clearly in the cable and it should be replaced.
Power outages
There are situations when there is simply not enough power for all devices. For example, when connecting an external hard drive, which uses two USB connectors at once, the printer or keyboard may turn off. In this case, the power of the power supply is not enough to provide energy to all consumers. In this case, the problem may not appear immediately, but after some time after turning on the computer. There are several ways out of the situation. If you have a low-power power supply installed, for example, 300 W, then it would be logical to change it to a more powerful one, 450-600 W. You can also use an active USB hub (with external power). It will allow you not only to increase the number of connected USB devices, but also to power them from a separate power supply.
Another reason that affects USB operation is a dead CMOS battery. But at the same time, every time you turn on the computer, you will observe a lost system time and date. After replacing the battery the problem goes away. But this does not occur often, so you should check other possible sources of malfunction.
Missing or incorrect installation of USB drivers
Causes associated with software problems in Windows 7/10 can be identified using Device Manager. If you notice that one or more devices in particular are not working, regardless of the port used, this may indicate that the problem is in the device itself. Open Control Panel and go to Device Manager. All connected devices will be displayed there. If there are items in the list that have a yellow exclamation mark next to them or the name is Unknown Device, then the problem is with this very device. There may be several possible problems here.
Often USB inputs stop working after reinstalling Windows 7/10. The reason is incorrect installation of drivers or the necessary drivers may not be found at all. You will have to select and install manually.
Often, to fix a problem you just need to update the drivers. So, if automatic Windows update, and the system itself was installed quite a long time ago, then its relevance is lost software, system errors may appear. In this case, the device begins to work incorrectly, or even stops functioning altogether. To update (reinstall) USB controller drivers, you can use a CD/DVD with drivers for the motherboard or download the necessary drivers from the motherboard manufacturer's website.
You can also turn off the power saving feature for all ports using Device Manager. Expand the list of used USB devices hidden in the sections “USB Controllers”, “Mouse and other pointing devices”, “Keyboards”. Double-click on to the desired device to open the properties window. Now switch to the “Power Management” tab and uncheck the “Allow the computer to turn off this device to save power” checkbox. Thus, the device will always be activated under any circumstances.
If some equipment is not recognized, then there may be either a problem with the drivers already known to us, or a hardware problem, consisting of a lack of contact, a damaged cable, or a malfunction of the controller. Moreover, it often happens that when a faulty device is connected, the others stop working normally. The keyboard starts to freeze, as does the mouse, and the printer stops printing. The problem is similar to power shortage, that is, all the power consumption goes to a faulty device, which may have a simple short circuit or other malfunction.
USB ports not working due to controller damage
If none of the above actions helped restore the functionality of the USB ports, then you should check the USB controller of the motherboard, which may have failed. High-quality repair and diagnostics in this case should be entrusted to specialists service center. As a way out of the problem, try installing an expansion card, the so-called USB PC controller, which is installed in the PCI slot on the motherboard. This solution is noticeably cheaper than repairing the motherboard USB controller, and when using an additional USB hub, the problem with the lack of ports will not be relevant at all.
As you can see, finding and fixing problems with USB ports is quite a troublesome task, and all because there can be a lot of reasons. Consistent search and elimination of obviously incorrect paths will allow you to identify and eliminate the problem.
How to install drivers on a laptop with an operating system Windows system 7, when not working and network controller!? What is the power of Notepad!?
Hi all!
A little background...
Just the other day I came across such a task, namely installing a transformer on a Laptop Dell Inspiration 3147-9182 2-in-1 (Touchpad) Windows 7. I took out all my flash drives, disks and external (usb) DVD-Rom. With a few manipulations in the BIOS, I installed booting from an external DVD-Rom. Poe demolished everything sections of hard disk and started installing Windows 7.
Important!!! (Just in case...) Before demolishing the partitions, I completely created the native Dell utility backup copy the entire system onto a flash drive.
Windows was installed and then I realized with horror that the drivers for usb, network controller, etc. didn't get up. Those. laptop is completely cut off from " outside world"and accordingly there is no built-in CD-ROM and my USB DVD-Rom is not recognized in the OS. I thought and thought and went to Google and came across a couple of tips that didn’t apply to my case. One of them is to disassemble the laptop - remove hard drive, connect it to another PC and install drivers. This option is good, but my laptop is completely new, especially not mine, and I didn’t dare to spin it up.
Then I remembered about the ERD commandera disks (which I had), inserting them one by one because... different versions under different Axes, I tried to reach installed Windows. Unfortunately not alone ERD commander I didn’t want to load, they say there’s no suitable one Windows installed. I tried to install an OS of a different build, but also Windows 7, in the hope that the drivers would install. Do you think it helped me? Of course not!
Then the thought struck me, I need to somehow transfer the drivers onto the installation disk, and then from it onto the logical partition (for example D) of the laptop.
I took the installation disk (necessarily from that Windows versions, which is installed on the laptop) - downloaded it to the laptop from the office. Dell website drivers for network controller and wifi. Then in iso image installation disk copied the necessary fresh drivers. Only the first time this installation disk refused to start on my laptop, I think because I placed the drivers in the root of the installation disk image. I again changed the iso image of the driver to the installation disk along this path: H:\efi\microsoft\boot\fonts
Now the disk has started loading.
Just be careful, we new installation absolutely not needed, we need a NOTEBOOK. In order to open Notepad, you need to go to the installation disk window - where it will say “ System Restore» - « Action selection» - « Diagnostics» - « Add. parameters" and finally " Command line" I tried for a long time command line copy the folder with drivers to the laptop. Nothing worked for me, because... drive names (letters) were assigned differently. And then a bright thought came - the command “ notepad" (notebook). Go to notepad – file – open – be sure to set the file type to “ All files" - we go to our boot disk along the way (in my case) H:\efi\microsoft\boot\fonts, where H is the drive letter. We find the drivers and copy one driver at a time (since the system freezes) to local disk D. Hurray comrades.
I suffered for 4 days until it dawned on me. I hope this article will help you, maybe there is a much easier way, but I am sure of this and you will share it with us in the comments. Good luck everyone!
Immediately after installation of the operating room Windows systems 7 Some users notice that the USB ports on their computer do not work. Let's figure out what actions need to be taken to be able to connect devices to a PC using the above protocol.
Let us immediately note that this article will talk about a specific problem after installing, reinstalling or updating Windows 7, that is, about a situation where before installing the operating system everything worked fine, but after performing the specified procedures, it stopped functioning. We won't stop at others possible malfunctions related to the fact that the computer does not see USB devices. A separate lesson is devoted to this problem on the site.
The problem we are studying has two main reasons:
- Lack of necessary drivers;
- Incorrect entries in system registry(after upgrading Vista to Windows 7).
Method 1: USB Oblivion
This solution is suitable just in case you upgraded to Windows 7 from an earlier operating system. In this case, entries in the system registry about previous connections of USB devices may be saved, which will be incorrect in the updated OS, which will lead to problems with further connection attempts. In this case, all records of previous connections must be deleted. The easiest way to do this is with USB utilities Oblivion, which is precisely intended for this purpose.
Method 2: Microsoft USB Troubleshooter
Microsoft has its own fix USB faults. Unlike the previous utility, it can help not only after installing the operating system, but also in many other cases.
Method 3: DriverPack Solution
After installing Windows 7, it is possible that your computer will not be able to receive and transmit data via the USB protocol due to the lack of necessary drivers. This situation is especially common if USB 3.0 connectors are installed on a desktop PC or laptop. The fact is that Windows 7 was developed even before this standard began to be implemented en masse. For this reason in basic version the said OS does not have the necessary drivers immediately after installation. In this case, they need to be installed.
The easiest way to solve this problem is if you have a disk with the necessary drivers. In this case, you just need to insert it into the drive and extract the contents to your computer using the prompts that appear. The functionality of the USB ports will be restored. But what to do if you don’t have the required disk at hand? We will consider the actions that need to be taken in this situation below.
The easiest way to solve the problem is with the help of tools designed to find and install the missing drivers on your computer. One of best apps in this class is .
- Launch the program. When activated, it will simultaneously scan the system for connected devices and detect missing drivers.
- Click on the button "Set up your computer automatically".
- After this, the program itself will create a restore point in case an error is made during the setup process or you simply want to roll back to the old settings in the future.
- After this, the procedure for installing drivers and configuring some PC parameters will be performed.
- After the procedure is completed, a message will appear that all the necessary settings have been completed and the missing drivers have been installed.
- Now you need to restart your PC. Click "Start". Next, click on the triangular icon located on the right side of the button "Shut up". Click.
- After restarting, you can check whether the USB ports are working or not.
Method 4: Manually installing drivers
The necessary drivers can also be installed without installing additional software to search for them. But this will require a little more tinkering.
- Click "Start". Sign in "Control Panel".
- Go to "System and Security".
- In the list of tools "System" click on the item "Device Manager".
- The interface will be displayed "Device Manager". A list will be presented in the shell that opens various types devices that are at the moment connected to your desktop computer or laptop. Click on the group name "USB Controllers".
- A list of elements will open. You need to find one of the following names in the list:
- Generic USB Hub;
- USB root hub;
- USB Root Controller.
These are the types of ports. The list will most likely have one of these names, but it may appear multiple times depending on the number of USB outputs on your computer. Despite this, it is enough to perform the procedure described below with one of the identical elements, since drivers will be installed on the computer for all ports of the same type. If there are several different names of elements from the above list, then for each of them you will have to perform manipulations separately.
So, right click ( RMB) by element name and select from the list "Properties".
- A window will open in which you need to click on the name of the tab "Intelligence".
- After that in the field "Properties" select an option from the drop-down list "Equipment ID". In the area "Meaning" The device ID will be displayed, that is, in our case, the USB port.
- This data must be saved. They can be written down or copied. To do the second option, just click RMB by area content "Meaning" and select from the menu "Copy".
Attention! The main thing is that after this, do not copy any more data until the search operation is completely completed. necessary drivers. Otherwise you will simply replace the information in "Clipboard" about driver IDs with new data. If you still need to copy something else during the procedure, then first paste the data from the equipment properties window into "Notebook" or any other text editor. This way, if necessary, you can quickly copy them again.
- Now you can start directly searching for the necessary drivers. Open your browser and go to one of the popular ones - DevID or DevID DriverPack. You need to enter the data that you copied in advance into the search field of the site and click on the button that starts the search.
- After this, the search results will open. Choose the option that suits yours operating system(in our Windows case 7) and its bit size (32 or 64 bits), and then click on it.
If you use the DevID DriverPack service, you will need to specify the OS name and bit depth there before you start the search.
- After you have gone to the driver page, download it, unpack it from the archive if necessary, and run it on your computer, following the prompts that will be displayed on the monitor. After restarting the PC, the problematic USB ports should work. If this does not happen, then look for the origins of the problem in incorrect registry entries, as described above.
There is another option for downloading the necessary drivers - do it from the official website of the manufacturer of USB controllers that are installed on your PC. But in this case, you must definitely find out the address of this Internet resource, as well as the exact name of the controller model.
There are two main reasons why USB ports may not work after installing Windows 7, although before that they functioned normally. Firstly, these are incorrect entries in the system registry left over from the old OS, and secondly, the lack of necessary drivers. Each of these problems can be solved in several ways, which we described in detail in this article. So, after reading the material, users can independently choose the most convenient and acceptable course of action for them.
Many of our readers asked for an explanation Why don't USB ports work? and also why the error “ Error. USB device not identified" I finally found the time to write this long-awaited article. USB ports are not always the cause of a connected device not working.
Very often external device fails, which is why the error about a faulty USB port pops up. Before moving on to the next steps, make sure that the USB device you want to connect is working (check with a friend or on another computer). If you are sure that your device works, then this article is just for you.
Causes of the problem
They may be completely different, but you need to find out the exact reason why USB ports don't work.
- If the above methods did not help and still USB ports don't work, try going to “Device Manager” and checking the “Controllers” section for devices with a yellow exclamation mark. If present, double-click on the device and read the reason for that error.
- Perhaps the USB ports are not working due to incorrect installed drivers or their complete absence. The article will help you cope with this.
- It is possible that USB ports don't work because of the usual ones, but by installing and scanning your computer, we can find and
