1. Log on as administrator and use system restore to restore to a point before the programwas installed.
Or
2. Log on as administrator and use add/remove programs or, if present, the unistaller for the program.
OR
3. As administrator, take ownership of the folder where the program resides, give administrator full control, and delete it manually. If you do it this way make sure that you delete all references to it in the registry.
Cheers.