strange message

Tonight I got the following message:

 

"-21 startup items

-171 startup services

-Failed to compute size of files MB of temporary files"

For $4.99 they would fix whatever was wrong.

 

I received a similar message previously. After some time on hold, I conversed with a woman who spoke broken English, and could not explain the significance of this message. Tonight, when put on hold, I hung up. Fortunately I did not commit any $$$ to this situation.

 

Is this a scam of some sort? Shakes my faith in my NIS. $72 is a lot of money to me.

Can anyone tell me exactly what this means with respect to protecting my computer? I have been told  on different websites never to mess with my Registry. I am reluctant to allow this person to screw with my computer.

 

Please help.