Are you sure the spyware is not old?
From other software?
I don't know about you...but I don't check my task manager after every install. If you installed 10 items since you last checked...it could have been any of them.
Some spyware lay dormant, it could have been from forever ago.
You could have a virus that repackages your software. Meaning it makes it "look" like software is infected when really there is a bigger issue, something on your system is adding it to it.
There are many possibilities.