hem the adware software shouldn't had been the problem. did you downlaod limewire from limewire.com?
try reinstalling limewire, to uninstall you go to add/remove programs and uninstall there, than you delete the files, in the limewire folder, which is usually under program files. but carefull if you have any files in there taht you want to keep save them they should be in you shared folder and in the incomplete folder. delete the .limewire folder inside of c:/documents and settings. than install
hope this works cause i've never seen an adware program screw up a computer that much