Operating System
Reinstallation
Before You Begin
If you are considering reinstalling the Windows operating system to correct a problem with a newly installed driver, first try using Windows Device Driver Rollback.
To roll back a device driver:
1.Click Start 
.
2.
3.Click Properties→ Device Manager.
4.
5.Click the Drivers tab → Roll Back Driver.
Restoring Your Operating System
If Device Driver Rollback does not resolve the problem, then use System Restore to return your operating system to the operating state it was in before you installed the new device driver.
CAUTION: Before performing the installation, back up all data files on your primary hard drive. For conventional hard drive configurations, the primary hard drive is the first drive detected by the computer.
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