if your mouse is not working then there are some steps to follow-

USB mouse

Reboot the computer to resolve this issue.
disconnect the mouse cable and then reconnect to a different USB port.

Connect Disconnect Usb Cable
try to change your mouse or change your port.
clean your mouse.

Reinstall USB

Right Click My Computer
then click on Properties and open Device manager.

Look for universal serial bus/USB drivers/other devices.
uninstall USB devices by right click and unistall the device
restart the computer
let USB reinstall.

Update USB Driver Software

Wireless mouse

If the mouse does not appear to be on, replace the batteries

Make sure the wireless receiver is within range

Disconnect the wireless USB adapter and try plugging it into a different port.
and try to reinstall your driver and turn off your computer.

uninstall-driver-device-manager

Touchpad Mouse

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try to restart your laptop and Make sure you have all the latest Windows updates latest drivers installed on the computer.
if not then try to update your window and re-install your touchpad driver.

Try to Troubleshooting

click on start and in the search bar type trobleshooting and under system and security c04540920 click on run maintenance task windows-7-sp1 and follow instrustion after that click on Fix problem with windows update.

delete some temp file and clean your computer from the viruses, spyware, junks, cookies, koobface..

If all of the above solutions do not resolve the issue, run an operating system repair or restore your window.

040520system20restore-11341606

i hope this will help you out.

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