If the mouse is connected to the system unit via the PS / 2 connector (round jack on the rear panel, next to which sometimes have an image of the mouse), you can not connect and disconnect the "hot" method, ie,when the computer is on.Short circuit may occur, which PS / 2 ports are very sensitive.

If you see that the cursor does not move and the system does not respond to mouse clicks, turn off the computer using the keyboard.To access the "Start" menu, press Ctrl + Esc, or Win.Use the "down arrow" and Enter selects "Shut Down" and confirm the request to shut down by pressing OK.

Disconnect the mouse cable from the port and gently, being careful not to ben
d the pins of the electrodes, reconnect - the problem may be the lack of contact.Turn on the computer.If the mouse is earned, it means you did everything correctly.

USB ports are designed for "hot" connection.However, if the mouse is connected via USB, it does not work, still turn the system unit before replace slot - rebooting may help.

If the problem persists, check the mouse on another computer.If the cursor moves and the keys work, you may have a defective port on your system unit, or there is a problem with the software.

to identify the source of trouble, in turn, connect to the computer through a known good mouse PS / 2 and USB ports.Normally, no need to install special drivers - fit and the standard utilities Windows.If you do not work no device - most likely a problem with the software.

Using key Win, direction arrows, Tab and Enter, from the "Start" menu, go to "Control Panel", activate the icon "System" tab, "Hardware", click "Device Manager", then expand "Mice and other Pointingdevice. "Combination Shift + F10 to open context menu and choose the command "Delete", then reboot.The system will detect the new device, re-install the driver on it.

If you connect new hardware or install a new program, the reason may be a hardware conflict.Go to the system in safe mode when it is loaded in the minimum configuration.To do this, restart your computer and press F8 when you hear the beep.The boot mode menu, select "Safe Mode."On request the system to continue working in this mode, answer "Yes."If the mouse is working properly, remove the new hardware and software.Boot normally.

If your system has the option "System Restore", try to select "Last Known Good Configuration" in the mode selection menu.The system prompts you to download several restore points system.Choose the most close to the time when the problems started.If the attempt fails, try a different date.

enter recovery mode system can be different.When you restart, choose the option "Safe Mode", but the question of continuation of the work program answer "No".After that, you will be asked to choose a restore point.

In OS Windows built "Troubleshooter".To start it, go to "Control Panel" using the keypad, and open the icon "Mouse".Go to the tab "Hardware" by using Shift + Tab and press the "Diagnostics".To run the diagnostic use "Next" button.To select an answer to the question of the system, press Shift.Perhaps as a result it is able to determine the cause of malfunction.

If these methods do not help, check your computer for viruses.Download free trial AVZ4 and deploy it on a flash drive.Press Win + R and type in the box "Open" command F: \ AVZ4 \ avz.exe, where F: - the name of the removable disk in the system.Start the scan.

If the mouse works, but occasionally freezes, right-click an empty area of ​​the screen, choose the option "Properties" and navigate to the tab "Options".Click the "Advanced" tab and select the "Diagnostics".Move the slider "Hardware acceleration" one notch to the left and confirm by pressing OK.