Something along the lines of finding where it was installed on the disk (somewhere in C:\Program Files\), noting down the dlls, and then removing references to such dlls and also entire registry keys too if necessary from the registry. I think you had to do it with IE and also plain Explorer both not running (kill them with Task Manager) since it puts a toolbar in plain Explorer too. Then finally deleting the offending files, then reboot. If necessary, after deleting references in the registry and the files, do a hard reboot using the power switch/reset button, and not the normal shutdown procedure to prevent it doing any shutdown routines that could restore it.