Cause:

Solution:

1) Save your work and exit all open applications.
2) Turn off the computer.
NOTE: If removing an old mouse is not required, skip to step 4) for installation steps.
3) Remove the old mouse:

a) Trace the mouse cable to the back of the computer. Note the location of the mouse cable connection.
b) If the mouse connects to a 9-pin or 24-pin serial port, unscrew any hold-down screws on this plug.
c) Grasp the mouse plug firmly and pull it straight out.

4) Install a new serial mouse:

a) Match the connector styles of the mouse and the computer port, noting the port used (e.g., COM1, COM2):

1] If the connector on the new mouse matches the port from which the old mouse was removed, use this port.
2] If the connector on the new mouse is a 6-pin PS/2-style connector, use the port labeled 'Mouse'.
3] If the connector on the new mouse matches the 9-pin serial connector, use this port.
4] If the mouse plug differs in size from the port on the back of the computer, obtain an adapter (e.g., 9-pin to 6-pin serial port adapter, or 9-pin to 25-pin serial adapter).
5] If no serial port is available, a bus-mouse is required (see 'Installing a bus-mouse').

b) Examine the shape and markings (e.g., notches or arrow) on the mouse plug and plug it into the socket on the back of the computer. (Secure any port screws or finger screws.)
CAUTION: Excessive force may damage the pins or connector.
c) Turn on the computer.

5) Install the software:
NOTE: If replacing a mouse with an identical one, the following steps are optional (however, an updated mouse driver may be available).

a) Locate the mouse installation diskette and instructions. Insert the diskette in the floppy drive.
b) Type one of the following commands at the MS-DOS prompt:
<drive>:INSTALL or <drive>:SETUP
NOTE: Consult the documentation that came with the mouse for the correct command for installing the mouse driver.
c) Follow the on-screen instructions for the installation program.
d) Respond 'Yes' when asked for permission to add information to Autoexec.bat and/or Config.sys. (This adds the correct driver statement(s) to the Autoexec.bat and Config.sys files, enabling the mouse when the computer is turned on.)
e) Press CTRL+ALT+DEL to reboot the computer. (This loads the driver added to Autoexec.bat or Config.sys into memory and enables the mouse to function.)

6) Do the following if applicable:

a) If the new mouse model differs from the old mouse, update Windows 95 as follows:

1] Click the 'Start' button to display the 'Start' menu.
2] Select 'Settings' and select 'Control Panel'. (The 'Control Panel' window appears.)
'Mouse' icon in 'Control Panel'
3] Double-click the 'Mouse' icon. (The 'Mouse Properties' dialog box appears.)
'Mouse Properties' dialog box
4] Click the 'General' tab on the 'Mouse Properties' dialog box.
5] Click 'Change...'. (The 'Select Device' dialog box appears.)
6] Select the 'Show all devices' radio button on the 'Select Device' dialog box.
7] Do one of the following:

a] Use a listed driver:

1} Select the manufacturer from the 'Manufacturers' list box.
NOTE: If the manufacturer is not listed, select 'Standard Serial Mouse' from the list box.
2} Select the model type from the 'Models' list box.

b] Use a manufacturer-supplied driver diskette:

1} Click 'Have Disk...'.
2} Insert the manufacturer's diskette in the drive.
3} Type the letter of the disk drive which contains the manufacturer's diskette, or click 'Browse...'.

8] Click 'OK' and click 'Close' to return to the desktop.

7) (Optional) Change settings for mouse movement and click rate:

a) Click the 'Start' button to display the 'Start' menu.
b) Select 'Settings' and select 'Control Panel'. (The 'Control Panel' window appears.)
'Mouse' icon in 'Control Panel'
c) Double-click the 'Mouse' icon. (The 'Mouse Properties' dialog box appears.)
d) Click the 'Motion' tab on the 'Mouse Properties' dialog box.
e) Adjust the 'Pointer speed' and 'Pointer trail' slider bars to change the rate at which the mouse moves on the screen.
'Mouse Properties' dialog box
NOTE: Moving the slider to the right increases the pointer's speed (or trail); moving the slider to the left decreases the pointer's speed (or trail).
f) Click 'Apply'.
g) Select the 'Buttons' tab on the 'Mouse Properties' dialog box.
h) Adjust the mouse speed by moving the 'Double-click speed' slider bar. Readjust the double-click speed as necessary.
'Mouse Properties' dialog box
i) Click 'OK'.

8) Use an application that uses the mouse to make sure the mouse is working properly.