how can I remove an adware display from my desktop that just appeared and now I have no control of settings?

The adware took control of my desktop and it displays a crazy desktop and I try to remove it by going to desktop properties but it shows nothing else is available.. I did a system restore and it is still there..Done a computer search to locate a file by that name and nothing shows up Can anyone tell me how to gain control of my desktop again
I have found the uninstall for the perpetrator but now I cannot use my display properties to reestablish a desktop all I have is a script error in the middle of my desktop and when I click on restore it does nothing and adalert was the culprit in all of the wrong doing and I willl notify MS about the situation as they should provide the most security updates