Invalid ip settings. The adapter does not have valid IP settings: what is the problem? Clean boot system

Your computer does not see the flash drive, what should I do? First of all, you need to find out whether this is due to hardware problems - a malfunction of the USB port or the drive itself. How to do this? When a working drive is connected to a working port, its indicator light should start blinking. This indicates that both the flash drive and the port are in perfect order, and the source of the problem is software in nature and is located in the operating system itself. IN otherwise- the malfunction has a hardware cause. Let's take a look possible options in more detail.

Hardware reasons

• It often happens that the computer does not see the flash drive connected to the USB port located on the front panel of the system unit. The main reason for this malfunction is that these ports are simply not connected to the power supply or there is insufficient voltage supplied to them. To solve this problem, try connecting your drive to one of the ports located with reverse side system unit. Most likely, the flash drive can be easily identified.
• It happens that a USB device does not receive enough power due to overcurrent occurring in the ports or hub, or due to a fault in the power supply. Owners of outdated laptops may also encounter this problem due to the large capacity of the USB drive. In such a situation, nothing can be done. Another reason is too large number simultaneously used USB ports. Disable devices that are at the moment are not needed and try connecting your drive again.
• If after this the computer does not see the flash drive, then most likely the problem is not in the ports. Connect it to another PC, or better yet, to several. If the situation has not changed, the flash drive is definitely faulty. You can try to repair it by giving it to the appropriate specialist. Most often, this will cost more than the cost of the drive itself. Therefore, you need to resort to this option only if the information contained on the flash drive is important and you simply need to restore it. In other cases, it is easier and cheaper to purchase a new one.

Software reasons

If the USB device turns out to be working, then the problem lies in the operating system settings. For example, a computer often does not see a flash drive when support for USB ports is disabled in the BIOS. If this interface is enabled in the settings, then when you connect the drive you may see a message saying that “USB device is not recognized”, and the safe removal icon will change to an exclamation mark. What could be the reason for this, we will consider further.

• One of the most common problems is that when you connect a USB device, it is assigned a drive letter that is already present in the operating system, so the computer does not see the flash drive. Most often this happens when there are network drives. To fix this, you need to go to the “Control Panel” menu, then to the “Administration” section, then “Computer Management”. In the window that opens on the left, select the "Disk Management" line. A list of disks will open on the right, visible to the system, which should include your USB drive. Select it and go to the context menu, find "Change drive letter or drive path." Assign any free letter to the flash drive.
• Another reason could be outdated versions or lack of motherboard drivers at all. In order to determine its model, we recommend using the Everest program. Next, download the most current versions drivers from the manufacturer's official website. We do not recommend installing software from other sources - this can cause irreparable harm to your PC.
• It happens that everything is checked and in order, but the system does not see required driver. To check this setting, you should use the "Device Manager", which can be accessed through the same "Control Panel". In the list that opens, pay attention to “USB Controllers”: if there is a yellow icon next to at least one USB device question mark- remove it and install the driver again. The last resort would be to remove all USB controller drivers. After a reboot, the operating system will automatically install them again. It is important to note that it is better not to use this method unless absolutely necessary.
• Sometimes the reason for the “invisibility” of a flash drive can be viruses. In this case, be sure to scan your PC for malware and get rid of infected files. If you can’t afford a paid antivirus program, it doesn’t matter. There are now a large number free applications, or you can temporarily use the trial version of a well-known antivirus.
• Also, do not discount the possibility of a conflict between the file systems of the USB drive and the PC. The most common option is when the computer's file system is NTFS, and flash drives are FAT. In this case, just reformat it also to NTFS, this should help.

You bought a brand new smartphone and, say, you want to download your playlists from your computer to it. Or your phone is already a year old and only now you decided to connect it to your computer. But that was not the case: the computer simply does not see the phone connected via a USB cable.

There may be several reasons why this happens. Let's deal with everything in order.

The first thing you need to pay attention to is the cable with which you connect the phone to the computer. If you purchased an inexpensive cable for this, it may easily not match necessary requirements by resistance or material. In this case, it is better to use the standard cables that come with the phone.

The second thing to check is Computer USB port, to which the phone is connected. Connect the phone to any other port on the computer; if everything is fine, then the port itself is faulty. The reason for this may or may not be installed drivers, or the USB port is simply not connected to motherboard.

Now try it restart your computer and phone. It happens that after a banal reboot, the devices begin to “see” each other. When the phone is turned off, remove the battery from it, wait a couple of minutes and insert it back - this may also help.

If you have the Windows XP operating system installed and you connect to Android computer device, then install Media Transfer Protocol on your computer. It can be downloaded from the official Microsoft website: https://www.microsoft.com/en-US/download/details.aspx?id=19153.

For some phone models, when connecting to a computer, you can select USB connection option. Place a marker next to the item "Media device (MTP)". If you don’t see such a menu, then go to “Settings” – “Network” and enable one of the parameters: or "Media device (MTP)", or "USB drive".

Another reason why the computer does not see the phone via USB may be installed drivers. First, disconnect your phone from your computer. Then go to “Start” - "Control Panel" – "Device Manager".

Here we click on the transparent arrow opposite the item "USB Controllers" to open the list. Now connect your phone using a cable to your computer. Device Manager should refresh and the new device will appear in the list. For comparison, I posted two photos. After connecting, on the second, it appeared.

Everything is fine with my drivers. If opposite this item you have a yellow exclamation mark or a red cross, as shown in the figure below, this means that the drivers require updating or are not installed at all.

To fix this, click right click mouse by item "USB Mass Storage Device" and choose from context menu"Properties" .

Then you can find drivers by device instance code. How to do this is described in the article. If you have the Windows 7 operating system installed, from the drop-down list instead of "Device Instance Code" look for "Equipment ID".

Another problem why the computer does not see the phone can be viruses. Check devices using antivirus program, if it finds something, delete the malicious files. Then restart your computer.

I hope one of the tips will help you and a similar problem will not arise in the future.

If you are faced with the fact that the phone does not connect via USB, that is, the computer does not see it, in this guide you will find all the options known to the author for the reasons for what is happening, as well as ways to fix the problem.

The steps below apply to Android phones, as the most common among us. However, they can be used to the same extent for Android tablets, and some points can help you understand devices on other OSes.

Why is my Android phone not visible via USB?

I think it’s worth starting by answering the question: did the computer always not see your phone or did everything work fine before? The phone stopped connecting after actions with itself, with the computer, or without any actions at all - the answers to these questions will help you quickly figure out what exactly is the matter.

First of all, I would like to note that if you recently purchased a new Android device and it is not seen by a computer running Windows XP (at the same time old phone on Android can easily be connected as a USB flash drive), then you should either update the operating system to one of the currently supported ones, or install the MTP (Media Transfer Protocol) protocol for Windows XP. You can download MTP for XP from the official Microsoft website here: http://www.microsoft.com/en-US/download/details.aspx?id=19153. After installation and restarting the computer, your phone or tablet should be detected.

Now let's move on to the situation where the phone is not visible via USB in Windows 7, 8.1 and Windows 10. I will describe the steps in relation to Android 5, but they are similar for Android 4.4.

Note: for devices that are locked graphic key or password, you need to unlock the phone or tablet connected to the computer in order to see the files and folders on it.

Make sure that the phone itself, when connected via USB, reports that it is connected, and not just for charging. You can see this by the USB icon in the notification area, or by opening the notification area in Android, where it should be written what device the phone is connected to.

Typically this is a storage device, but may be a Camera (PTP) or a USB modem. In the latter case, you will not see your phone in Explorer and you should click on the notification about using a USB modem and turn it off (you can also do this in Settings - Wireless networks - More).

If your phone is connected as a camera, then by clicking on the corresponding notification, you can enable MTP mode for file transfer.

On older versions of Android, there is more modes USB connection and will be optimal for most use cases USB Mass Storage. You can also switch to this mode by clicking on the message about USB connection in the notification area.

The phone does not connect via USB to the computer, but only charges

If no notifications about connecting via USB to the computer appear, then here is a step-by-step description of possible actions:

1. Try connecting to another USB port u. It would be better if it was USB 2.0 (the ones that are not blue) on the rear panel. On a laptop, accordingly, just USB 2.0, if available.
2. If you have compatible USB cables from other devices in your home, try connecting using them. A problem with the cable may also be the cause of the situation described.
3. Are there any problems with the jack on the phone itself? Did it change and did he fall into the water? This could also be the reason and the solution here is replacement ( alternative options I’ll state it at the end of the article).
4. Check if your phone connects via USB to another computer. If not either, then the problem is in the phone or cable (or you checked it poorly Android settings). If yes, the problem is on your computer. Do flash drives connect to it at all? If not, try going to first Control Panel - Troubleshooting - Device setup(to try to fix the problem automatically). At the same time, you should try disabling power saving in the device manager for Generic USB Hub.

If nothing from the list helps solve the problem, then describe the situation, what was done and how your Android device for USB connection in the comments, I will try to help.

Attention: latest versions Android devices are connected via USB to the computer in charge-only mode by default. Check the notifications for the availability of selecting the USB operating mode if you encounter this (click on the item Charging via USB, select another option).

Every person has encountered a very unpleasant situation when the PC does not see the flash drive. The reasons for this phenomenon can be very different, but in the most common cases, eliminating this problem does not require special knowledge or skills; it is enough to just have a basic understanding of the operation of the device.

If you know nothing at all about the desktop, and standard methods for solving this issue do not help, then this article will help you. It will discuss the main reasons why the PC does not see the connected device and methods to solve this problem.

Device failure

The most commonplace, but at the same time the most unpleasant option is a drive failure. To check this, you need to try using the USB flash drive on another computer. If he also does not see the device, then the diagnosis is obvious. Unfortunately, in this case nothing can be done. Your only option is to buy a new drive.

USB port problem

There are often cases in which the drive is not visible to the computer due to problems with the USB port. If we are talking about the rear port, then most likely the problem lies in its breakdown. In this case, it is recommended to call a technician who can repair it. But if the drive was inserted into the front USB port, then brighter scenarios are possible.

1. One option is low front port power. In this case, it is recommended to simply insert the drive into the rear port.
2. The front USB port may not be connected to the motherboard. In this case, you just need to connect it to system board. But if you don’t understand computers at all and can’t do this, then you should call a specialist. If you don’t want to use the services of a specialist, you can simply insert the drive into the rear USB port.
3. If the previous tips did not help, then you should look into the BIOS. The fact is that sometimes the manufacturer disables USB ports. This happens quite rarely, but you should still not forget about this possibility. In this case, you need to go into the BIOS (if Windows startup press Del, F2 or another key, which depends on the PC manufacturer). In bios you need to find the Configuration USB-> Advanced-> USB configuration section and enable USB ports there (USB Controller must be).
4. As with the rear port, the most common failure is also possible. Again, it’s worth calling a professional.

Virus on computer/flash drive

The likely reason why Windows does not detect the flash drive may be a virus. Therefore, if your desktop suddenly stops seeing the connected device, then it is worth checking both the computer and the drive for a virus. If after scanning a virus is found, the antivirus will fix the problem and your PC will safely see the device.

Driver failure

The PC may not detect the USB drive due to a driver malfunction specific device. In order to check this, you should go to the device manager (My Computer-> *Right Click*-> Properties-> Hardware-> Device Manager). Next, you need to click on the black plus, which is located next to the “USB Controllers” section.

Then you need to insert the drive and pay attention to which driver has changed. It needs to be removed. Immediately after this, we take out the flash drive and immediately insert it back. If you deleted that driver, the installation of a new driver will begin. After this, the PC will be able to see the connected device without any problems.

File system incompatibility

To solve this type of problem, you need to format the drive to the required file system. If you need to find out the file system on your PC, then you should go to My Computer-> *Right-click*-> Properties. In this section, you will learn which file system you need to format the drive into. This can be done using special program, which will see the flash drive if your problem really is incompatible file systems. In the program settings, specify the required file system and after a couple of minutes you enjoy the fact that the desktop sees your device.

Problem with recognized drive partitions

If your USB drive is detected, but it is not in the device partitions, this means that it has been assigned the letter of an existing partition. This problem occurs quite often, but it is very easy to solve. To solve this, you need to go to Control Panel->Administration->Computer Management->Disk Management. The central part of the screen will contain all the drives that are currently connected to the system. You need to click on “removable disk” (this is how your Flash card will be recognized) and then select “replace drive letter”. Here you change the assigned letter to any other free one, after which it will definitely be visible to the PC.

USB port is dirty

Perhaps this is one of the most common reasons why a PC does not see a flash drive. If the connector is dirty, you just need to clean it. As a result, your drive will become visible to the computer (of course, if there are no other problems).
This article examined all the possible reasons why a computer may not see a flash drive. If suddenly you could not solve your problem, then you should double-check each of the possible reasons. And then your flash drive will definitely be recognized by the computer.

In progress computer equipment Various failures and malfunctions may occur from time to time. Many users often look for an answer to the question: why doesn’t the USB port see the device? In fact, connecting USB devices to your computer may not be detected by the operating system. Windows system due to an error occurring.

Who is to blame and what to do?

The first place to start to find out the reasons for this “behavior” of the system is to check the serviceability of the device connected to the computer. You can use another device for this.

If the error repeats on another computer, we can conclude that the cause is the connected USB device. Whether to send it in for repairs or buy a new one is a decision at your discretion.

One of the reasons for the error may be the presence of bad contacts. Long-term use of wired mice and keyboards is usually to blame for this. Repeated kinking of the cable can damage the inner wire and lead to this problem.

Very often the error occurs due to static electricity. USB devices are a kind of storage of electrical charge, so when they are connected to computers, an electrostatic field often arises and the voltage increases. In this case, the protection system is activated, and all ports for connecting USB devices are automatically disabled.

How to fix the problem?

There are several ways:

• First of all, you need to disconnect the computer device from the power supply. If such a problem occurs with your laptop, you need to free it from battery. When the above steps are completed, wait 5-10 minutes, return the battery to the laptop, and connect the computer to the network. To your surprise, the ports will work!

• You can use another method to solve the problem. If the error occurs against the background of several simultaneously connected USB devices, you need to disable them. Then the device that was not recognized must be connected to the computer again. As practice shows, this method is effective.

• If the above methods do not provide the desired result, you can use another one. One of the reasons for the error may be incorrect driver installation. The problem can be resolved by disconnecting all USB devices from the computer ports. After this, you need to find Windows 7 C:\Windows\System32\DriverStore\. and delete the INFCACHE.1 file on your computer.

The next time you connect the flash drive, a new correct file with exactly the same name is created.

We hope that the above information will be useful to you and help in solving the problem.