Check the mouse cable, Restart the computer, 4 turn on the computer – Dell OptiPlex 360 (Late 2008) User Manual
Page 149: Test the mouse, Check the mouse settings, 1 click startæ control panelæ mouse, 2 adjust the settings as needed, Reinstall the mouse driver, Run the hardware troubleshooter, Network problems

Troubleshooting
149
C
H E C K
T H E
M O U S E
C A B L E
—
• Ensure the cable is not damaged or frayed and check cable connectors for bent or
broken pins. Straighten any bent pins.
• Remove any mouse extension cables, and connect the mouse directly to the computer.
• Verify the mouse cable is connected as shown on the setup diagram for your computer.
R
E S TA RT
T H E
CO MP U T E R
—
1
Simultaneously press
2
Press <
U>
,
press the up- and down-arrow keys
to highlight Shut down or Turn
Off, and then press
3
After the computer turns off, reconnect the mouse cable as shown on the setup
diagram.
4
Turn on the computer.
T
ES T
T H E
MO U SE
— Connect a properly working mouse to the computer, then try
using the mouse.
C
H E C K
T H E
M O U S E
S E TT I N G S
—
Windows XP
1
Click StartControl Panel Mouse.
2
Adjust the settings as needed.
Windows Vista:
1
Click
Start
Control PanelHardware and SoundMouse.
2
Adjust the settings as needed.
R
E I N S T A L L
T H E
M O U S E
D R I V E R
— See the Dell Technology Guide on your computer
or at support.dell.com.
R
U N
T H E
H
A R D W A R E
T
R O U B L E S H O O T E R
— See "Hardware Troubleshooter" on
Network Problems
WARNING:
Before working inside your computer, read the safety information
that shipped with your computer. For additional safety best practices information,
see the Regulatory Compliance Homepage at
C
H E C K
T H E
N E T WO R K
C A B L E
C O N N E C T O R
— Ensure the network cable is firmly
inserted into the network connector on the back of the computer and the network
jack.
C
H E C K
T H E
N E T WO R K
L I G H T S
O N
T H E
B A C K
O F
T H E
C O M P U T E R
— If the link
integrity light is off (see "About Your Computer" in the Setup and Quick Reference