End Program Sprtcmd.exe / Uninstalling Dell Support Center

i am on an XP operating system on a dell. everytime one of the users logs off, we get the window that says "ending program sprtcmd.exe", and then we have to go and end program manually every time we log off. i read a similar post on here where someone was having that problem, and was told it was related to the dell support center, and they were advised to uninstall it. i tried to uninstall the dell support center, and this message pops up: "Error 1306. Another application has exclusive access to the file c:/Documents and settingsBarbLocal SettingsApplication DataSupport SoftDell Support CenterBarbstate logssprtcmd.log.
Please shut down all other applications then click Retry"

It will not let me click retry, i have to close out the little window or hit cancel, then it goes through a little more of the "windows configuring", and then i get a little window for "add or remove programs" that says "fatal error during installation" and then that's that. it won't let me uninstall the program! i know this isn't a major problem or anything, but still having to manually click that window everytime i log off is quite aggrivating.