Windows keeps detecting RAID controller that is already installed

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http://superuser.com – Yesterday I replaced a RAID controller in my Windows computer (one of the ports on the controller died, and I replaced it with the exact same model). The manual for the RAID controller said to upgrade to the latest driver before replacing it, so I upgraded to the latest driver through the Device Manager. Then I shut down the computer and replaced the controller. When I restarted the computer, the "Found New Hardware" dialog box popped up with the name of the RAID controller, and I went through the wizard and installed the driver. After restarting, the Device Manager showed 2 entries under (HowTos)