At a minimum, displays unwanted behavior: puts two icons on desktop and in Start -> Programs, which cannot be removed by regular means. Special software ("KillBox") was required to delete them.
Inserted extra line into Internet Explorer settings:
CODE
O9 - Extra button: Freesoft - {e6be8e97-9343-42bd-9cfd-9e2e74db25d8} - http://freesoft.kljuc.net/ (file missing)
I do not know whether it did anything elses besides but am suspicious.