I am somewhat knowledgeable in computers but not enough to know how to edit the registry to delete uninstalled software/hardware from the memory of my computer. And also how to back up the registry. I know XP backs up the last good configuration, and with the system restore function I may never have to use it. But still, you never know. How can I modify the registry in Windows XP?
They make search engines so you can find the information you need to know. It's usually always easier than asking a bunch of questions. And amazingly, the people who make the program also tell you how to use it. How to back up, edit, and restore the registry in Windows XP and Windows Server 2003 http://support.microsoft.com/?kbid=322756