Click on the "Start" button. Select the "Settings" option and then the "Control Panel" option. Double-click on the "System" icon. Click on the "Device Manager" tab. Click on the "+" next to the mouse icon and then highlight the mouse installed on your system. Click on the "Remove" button and then click "Yes" to confirm the removal of the mouse from your system. Restart your computer. Windows 95 should detect your mouse when the system restarts. If not, open the Control Panel again and double-click on the "Add New Hardware" icon. Let Windows 95 search for new hardware. When the search is finished, restart your computer.