Afterwards, you find your Windows XP Professional operating system seems unstable. You need to restore the original version of the device driver.
Open the System applet in Control Panel, and roll back the device driver.
Device drive rollback allows you to restore a previous version of an updated device driver. Driver rollback affects only the changed hardware device. No other hardware or software on the computer is affected.
Navigate to the Hardware tab, and click Device Manager.
From Device Manager, select the affected hardware device and click Properties.
From the Properties dialog box, navigate to the Driver tab and click Roll Back Driver.
You can also open the System Restore utility, and load a restore point from a date before you installed the defective device driver. System restore points are stored in the C:\Windows\system32\restore directory.
To access System Restore, click Programs/Accessories/System Tools/System Restore
Using Windows XP, How to Roll Back a Device Driver