If the mouse connects to the system unit through the PS/2 connector (round connector on the back panel, next to which sometimes there is a picture of a mouse), it is impossible to connect and disconnect the "hot" way, i.e. while the computer is on. May cause short circuit, to which ports the PS/2 is very sensitive.

If you see that the cursor does not move and the system does not respond to keyboard mouse, turn off the computer using the keyboard. To call the menu "start" press Ctrl+Esc or Win. Press "down arrow" and Enter, choose the command "shutdown" and confirm the request to turn off by pressing OK.

Disconnect the wire of the mouse from the port and carefully, trying not to bend the pins of the electrodes, then plug it back in, the problem may be the lack of contact. Turn on the computer. If the mouse worked, so you did the right thing.

USB ports are designed for "hot" connection. However, if the mouse is connected via USB, not working, still turn off the system unit before you change the connector – restart can help.

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

To identify the source of the trouble, connect to the computer with a known good mouse via PS/2 and USB ports. Doesn't usually require installation of specific drivers – fit and the standard Windows utility. If not working no device - most likely a problem with the software.

Using the Win, directional arrows, Tab and Enter, from the menu "start", go to "control Panel", activate the icon "System", tab "Hardware" click "device Manager", then expand "Mouse and other pointing devices". Shift+F10 to call context menu and select the Delete command, and then reboot. System find a new device, re-install the drivers for it.

If you have connected any new hardware or installed a new program, you may have a hardware conflict. Log in to the system in the safe mode, when it is loaded with minimal configuration. To do this, restart the computer and press F8 after you hear a short beep. Menu download options, choose "Safe mode". On request the system to continue work in this mode, answer Yes. If the mouse is working fine, remove the new hardware and software. Boot in normal mode.

If you enable the option "system Restore", try selecting "last known good configuration" in the menu mode. The system will prompt you to download some system restore points. Choose the most close to the time when the problems started. If the attempt fails, try another date.

To enter the recovery mode of the system can be different. When you restart choose the option "Safe mode", however, the question of a program of continuing work answer "No". You will then be prompted to choose a restore point.

OS Windows built-in "Troubleshooter". To start it go to "control Panel", using the keyboard, and open the icon "Mouse". Go to the tab "Equipment" when using the Shift+Tab and press "Diagnostics". To run diagnostics, use the "Next" button. To select the answer to the questions of the system, press Shift. Perhaps as a result will be able to determine the cause of failure.

If these methods do not help, check your computer for viruses. Download our free app AVZ4 and deploy it on a flash drive. Press Win+R and enter this into the "Open" command F:\AVZ4\avz.exe where F: is the name of the removable disk in the system. Run the scan.

If the mouse works, but from time to time hangs, right-click on free place on screen, choose the option "Properties" and go to the tab "Settings". Click "Advanced" and select the Diagnostics tab. Slip engine "Hardware acceleration" one notch to the left and confirm by pressing OK.