Dell Dimension C521 - Manual (Page 53)

Advanced Troubleshooting
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4 In the System Properties window, click the Hardware tab.
5 Click Device Manager.
6 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.
Reinstalling Drivers
NOTICE:
The Dell Support website at support.dell.com provides approved drivers for Dell™ computers. If you
install drivers obtained from other sources, your computer might not work correctly.
Using Windows XP Device Driver Rollback
If a problem occurs on your computer after you install or update a driver, use Windows XP Device Driver
Rollback to replace the driver with the previously installed version.
1 Click the Start button, then click Control Panel.
2 Under Pick a Category, click Performance and Maintenance.
3 Click System.
4 In the System Properties window, click the Hardware tab.
5 Click Device Manager.
6 Right-click the device for which the new driver was installed, then click Properties.
7 Click the Drivers tab.
8 Click Roll Back Driver.
If Device Driver Rollback does not resolve the problem, then use System Restore to return your computer to
the operating state that existed before you installed the new driver.
Manually Reinstalling Drivers
1 After copying the required driver files to your hard drive, click the Start button, and then right-click
My Computer.
2 Click Properties.
3 Click the Hardware tab, then click Device Manager.
4 Double-click the type of device for which you are installing the driver.
5 Double-click the name of the device for which you are installing the driver.
6 Click the Driver tab, then click Update Driver.
7 Click Install from a list or specific location (Advanced), then click Next.
8 Click Browse and browse to the location to which you previously extracted the driver files.