What do you mean with "installed"?
BGINFO can be placed in a folder and the executed from there.. then you can save a config file and add it to the autorun key in order for it to run at every user logon..
But it is not installed in the sense of an application..
If you simply run it once and save the dektop background with some information, and now you want to revert back to the original background, simply run it again, remove all the fields and click Apply.. That will delete all the info from your desktop and you
are done..
HTH
-mario