USB mouse stopped working after loading Windows? There is a solution. Why does the keyboard only work in the BIOS, but turns off at boot? Mouse not working when starting windows 7
Hi all, Dear friends. Quite recently I had a strange situation, as it seemed to me, at work. The keyboard just stopped working. Actually, it hasn't completely stopped. As it turned out, the keyboard only works in the BIOS, and upon further loading it simply stops responding to any pressing.
And then there was an unpleasant situation, or rather a failure. After the reboot, it was necessary to select the boot mode, but I could not do anything, because none of the keys reacted. First of all, I thought that the keyboard was to blame, after which I replaced it with a new one, but it turned out, but after I put another device, the situation has not changed.
In general, I will not torment you. Most likely you used a USB keyboard, since no one had such problems with PS / 2. The thing is that in your BIOS USB keyboard support is disabled when loading Windows.
"How so? After all, everything worked before,” you say. Yes, indeed, everything could work for you, and you might not notice anything, since when the operating system boots, it automatically activates this support. But once it crashes and you need to do something during the loading screen, there's nothing you can do.
How then to proceed? I want to say right away that the first thing you need to check is the simplest thing that can only come to your mind, because sometimes the problem can really be somewhere on the surface. Therefore, first check if the keyboard cable is connected to the computer, try moving it to another USB port, and if possible, connect another keyboard.
If none of this helps, then it's most likely a configuration issue. You need to login to BIOS, namely at the very beginning of your computer boot press function key, which is responsible for the input. Most often it is a key DEL, but in different occasions it could be F1, and F2.
As a result, when you get into the BIOS itself, depending on the version, you will need to find the item related to USB keyboard support. It may be called "USB Keyboard Support", or "Legacy USB Support". If you see that these items are in the "Disabled" mode, then support is disabled and you need to activate the "Enabled" mode.
After that, save all the settings, reboot and voila.
As a rule, exactly this setting is the solution to this problem. Although I have heard that someone this decision did not help, and he decided to try to look for a problem in the components. It turned out that one plank random access memory was not quite working (in his words) and when he pulled it out, the keyboard worked in normal mode. I do not know how it is interconnected, but in which case, you can try this method.
Well, I will end here. I hope that you liked my article. And if you are still not subscribed to my blog updates, then be sure to do it now so as not to miss the most interesting. Well, I'm waiting for you again on my blog. Good luck to you. Bye Bye!
The main means of human interaction with operating system in PC are mouse and keyboard.
Therefore, if the display does not have touch functionality, then in the event of failure of these tools for feedback user with the machine, work stops until the problem is corrected.
The following guide will help you solve the most common problems with this important peripheral equipment.
Where to begin?
The hardware cause is the most common, so if the mouse or keyboard stops working, it is recommended to make them first visual inspection in order to detect damage.
In the absence of visible defects on the outside of the devices, it is necessary to lift them and shake them, if any of the elements has broken off or moved away from its place, then by the characteristic sound this will help to immediately diagnose the presence of problems in the equipment itself, and not in the PC.
However, it is better not to open and attempt to repair a mouse or keyboard without relevant experience.
They need to be tested by connecting to another computer and, making sure that they are not fully functional, simply replace them with new ones.
If the equipment is connected to the PC via wired connection, then you will need to carefully examine the cable, it should not have cuts, scuffs, kinks, and even more so visible breaks.
If applicable wireless type connection, then change the batteries. When an optical or laser mouse starts to glitch when you move the cursor, then the emitter is probably just clogged, which needs periodic cleaning.
For this, it is convenient to use a cotton swab. And in the case of using an old-style mouse, then remove the ball and wash it with warm water and soap.
Before you install the ball inside, you will need to clean the three rollers rotating around it with a cotton swab.
If the device does not respond to pressing a key, then a clogged contact is also sometimes the cause of the problem. The problem is solved by simple cleaning and removal of accumulated contaminants.
It is necessary to remove the wire plug or transmitter (if it is a “bluetooth” device) and insert it into another USB.
When connecting via PS / 2 or via a COM port, it is imperative to disconnect and connect peripherals only on a cold PC, i.e. the computer must be turned off (only this condition will ensure safe way equipment reconnection).
It should be noted that the mouse freezes in the PC, regardless of the installed OS, Windows 7 or the modern Ten.
The response of the device to human movement largely depends on the state of the emitter and the reflection surface.
If it has pronounced reflective and refractive properties, then this can cause response delays for a long time.
After making sure that there are no hardware problems, you can proceed to the analysis of software faults.
Software failure
The computer OS communicates with the hardware through special software called drivers. You must first restart your PC.
If the restart did not fix the problem, then you need to perform the following steps:
Important digression: The steps below can be performed using only the keyboard or mouse, depending on which device can work properly, and if using a laptop, then use the touchpad.
Of course, the owners of modern touch displays will not have any difficulties in executing the instructions.
In the case when the “keyboard” and “rodent” refuse to respond to the user’s input at the same time, and at the same time they are connected to a stationary PC without a touchpad and the monitor does not have the proper function of entering information through touch, then all actions will need to be performed through remote control.
In "Seven" you can use "Radmin" for this, which makes it easy to manage your computer through another computer.
Obviously, on this “other” PC, the peripherals should work properly:
- Open the "Control Panel" window;
- Go to the "System" tab;
- Click "System Properties";
- Click "Equipment";
- Enter the "Device Manager";
- Select the problematic equipment marked with the sign "!" on a yellow background;
- Click "Action";
- Click "Delete";
- Click "Ok";
- Exit the "Device Manager";
- In the "System Properties" menu, open the "Hardware" tab;
- Click "Hardware installation";
- Then, in the menu that appears, click "Next";
- Follow the instructions of the master;
- After completing the procedure, the device will work properly, i.e. the system will be able to see and interact with it again.
Note: if in automatic mode The OS could not find the driver, then the user will be required to download it independently, for this it should be by visiting official resource manufacturer, download the software and install it on a PC.
Often, when purchasing some models of a mouse or keyboard, driver disks are included with them.
In this case, you just need to insert it into the drive and, after waiting for the installation wizard to start, install the software on your computer.
The result of exposure to malicious applications
The virus can be a source of failure in software computer, so it is recommended to scan all its disks for infection by malicious utilities. 
But what to do when the security program is not installed on the computer?
If there is no antivirus on the PC, then free modifications of such programs are available for installation and use on the Internet that successfully cope with the detection of many viruses, for example, AVG, NANO and Avir.
But if malware damaged the registry or other important components of the system, then after treating the PC, in "Windows 7" it will be most convenient to simply roll back the OS to working condition when all items and connected equipment are functioning normally. 
How to roll back the "Seven"
A rollback will leave the user's personal data intact, but software that was updated after the restore point date will be gone and will have to be updated again.
Perform the following steps:
Oh, those computers, there is always something to do. Back in the days when instead of the Internet there were BBS (Bulletin Board System) replacing the current chat rooms, social networks and file dumps, I said that you can give the computer all the time that you have. And now, with the widespread dominance of the Internet, this topic is even more relevant. And it is also surprising how some seemingly elementary things, if you call the computer for help, take not at all elementary time. It was a hint. A fairy tale ahead.
Let's start from afar. As you all know, a computer without input devices such as a keyboard and mouse can be a touchscreen (and some also have a joystick) - a simple piece of iron that buzzes and consumes electricity. I got a computer that needed to be looked at and slightly revived after a virus had frolic there. I took out a spare monitor from the shelf, connected a spare keyboard, a spare USB mouse (this is important), turned it on, climbed BIOS settings (base system I / O), loaded Windows and op, the mouse turned off. I just worked in the BIOS, the pointer ran like this, but after loading Windows it does not work. What the heck?
We know that there are at least two common types of mice (computer), which differ in the connection connector. These are PS/2 and USB. If the first option is used primarily on desktop computers, then the second one can be used everywhere, even connected to modern smartphones. And what is important 
o, the USB connector can be turned on and off in “hot” mode, i.e. when the computer is turned on, but if you have a PS / 2 connector, it's better not to risk it, because it can simply burn out. It is better to turn off the computer, and then connect and disconnect the connectors. Older computers had two PS / 2 connectors that differed in color. Green for the mouse and purple for the keyboard. Now there may be only one, or even none.
Let's go back to my computer. The symptoms are as follows: The mouse is perfectly functional, it works until the operating system is loaded, it works all the time on another computer, i.e. case in Windows. USB port also works, if you connect a keyboard or a USB flash drive to it, then everything is fine. Other USB mouse also doesn't work. But the PS / 2 mouse works fine. When connected to another USB connector, the system writes that the device was found, the driver is being installed, the driver was successfully installed, but the mouse also does not work.
We look at devices through the device manager. In it, we are interested in Mice and other pointing devices. If we do not see our mouse in the tab, then there is a problem with the driver *. And another problem is that USB mice are so standard that a special driver is not needed and is already on the list of standard ones. We connect the mouse, we see that something new has appeared in the section HID devices, therefore the mouse is recognized not as a mouse, but as something else. In this case, it does not matter which USB port the mouse is connected to. Will not work. To correct the situation, you must manually change the driver on the HID device. From context menu HID devices choose Update Drivers->Find and Install Drivers Manually->Select from Installed Drivers->HID Compliant Mouse
After that, the USB mouse appears in the mouse list and starts working. Even after disconnecting-connecting and restarting the computer.
*Driver is a program that allows you to directly control the device in the operating system. Since the operating system does not know about the whole variety of devices, for full-fledged work, device manufacturers release a driver that becomes an intermediate layer between the device and the operating system. If the device is standard, then a special driver is not needed, it is already included in the operating system.
