I always do that when a new device fails.
I have a Brother laser multifunction on a USB port, with the scanning software by Scansoft Paperport. This software will not scan because it will not install properly despite the best efforts of 2 computer people, and uninstalling and installing about 20 times using various methods. I have XP Pro, Service Pack 1. Brother support has been useless and Scansoft support non-existent, other than acknowledging on their website that they can't get Paperport to work with XP Service Pack 2. I get two install error messages. "The class installer has denied the request to install or upgrade this device" and "A service installation section in the INF is invalid". Does anybody have any ideas (besides throwing the Brother MFC in the garbage)?