What is so special about the Nielsen ratings company that it should get to keep spyware on others' computers?

During a free trial of a spyware/adware detection and removal program, I came across a small number of spyware/adware programs that had been installed by different parties on the computer I was using. I successfully removed all of them but one. The one one which I did not remove, came with an advisory not to remove it because it had been placed by a company connected with the Nielsen ratings company and therefore collected valuable information.

I am not all that impressed with the Nielsen ratings company. I furthermore resent claims that it should have exclusive rights to intrusion on the privacy of others.

A local branch of a Nielsen-connected company once placed a bogus phone survey to my home one evening. I traced the call back to their office. The information I inadvertently had given them, I believe, put some people in danger.

Why is this company so special? Much spyware and adware on computers is unwanted and regarded with disdain. I do not like focus groups.

So get rid of it. Just because you get a message suggesting its important doesn't mean it is. If you dont want to be sending them information, dont. That message is probably just to try and persuade people to leave their spyware alone. If it came bundled with other software, removing it may stop that software from working... but to be honest, any software that contains spyware is not worth using anyway, in my opinion.