I just uninstalled Norton Internet Security 2009 and used the Norton Removal Tool. I then installed Norton Internet Security 2010 because I could buy it cheaper than updating my subscription.
I am using Windows 7 64 bit. When I started Windows after using the Removal Tool there would be a series of "du du du" sounds but no pop-up or error message. Going to the Sound page in Control Panel I discovered that this meant "Failure of device to connect".
When "Googled" I found that other people had experienced the same problem with Norton Removal Tool.
If you open Device Manager you will see a bunch of yellow exclamation points that say the registry is damaged. Uninstall all of the involved drivers and then pull down the Actions menu and select Scan for Harware Changes. Windows will install new drivers and the "du du du" sounds will disappear.