Before installing something new on your system use the "system restore\create a restore point" feature on XP. I set the restore name as "Leroy's mm-dd-yy restore." I found that XP doesn't always set a "system check point" every single time a new application is installed. If the new installation fails then you can always go back and restore your system by running the feature from "Help and Support," and selecting your restore point as the one to restore to. Ironically, not all software includes an uninstall utility program for removing the application.