Dell OptiPlex 740 Quick Reference Manual page 68

Scroll down the list to see if any device has an exclamation point (a yellow
circle with a [!]) on the device icon.
If an exclamation point is next to the device name, you may need to reinstall
the driver or install a new driver (see "Reinstalling Drivers and Utilities" on
page 68).
®
Windows XP
1 Click Start→ Control Panel.
2 Under Pick a Category, click Performance and Maintenance, and click
System.
3 In the System Properties window, click the Hardware tab, and click Device
Manager.
Reinstalling Drivers and Utilities
NOTICE:
The Dell Support website at support.dell.com and your Drivers and
Utilities media provide approved drivers for Dell™ computers. If you install drivers
obtained from other sources, your computer might not work correctly.
Using Windows Device Driver Rollback
If a problem occurs on your computer after you install or update a driver, use
Windows Device Driver Rollback to replace the driver with the previously
installed version.
If Device Driver Rollback does not resolve the problem, then use System
Restore (see "Restoring Your Operating System" on page 61) to return your
computer to the operating state that existed before you installed the new
driver.
Windows Vista:
1 Click Start
2 Click Properties→ Device Manager.
NOTE:
administrator on the computer, click Continue; otherwise, contact your
administrator to enter the Device Manager.
3 Right-click the device for which the new driver was installed and click
Properties.
4 Click the Drivers tab→ Roll Back Driver.
68
Quick Reference Guide
and right-click Computer.
The User Account Control window may appear. If you are an