Dirty rotten computer scammers

Ok, so I'm not a computer engineer or what have you. I can usually load up a new computer with the programs I need, transfer data, you know the basics. Well...today I made a faux pas...what could have been a really bad one...I needed to download a program, I've done this hundreds of times before, for years...and I go to the website and it doesn't work, I get an error message. Please call... So I called the provided number...well...it was very frustrating...this guy keeps trying to tell me about the issue I have and how complex it is...the whole time, I'm saying this does not make sense...this is a new computer, this could not be accurate...he keeps getting more technical...then finally the magic words are dropped it will cost you additional fees to get this corrected. I asked to speak to his manager. And I said, look something about this seems fishy, I need you to verify to me you are from the company I contacted. The guy starts getting belligerent with me...and I will admit, I was not being a kind sweet little old lady either. I knew at this point it was not good.  Next thing I see is them attempting to create a password to lock me out of my own computer!!!  I'm sure that dishonest fellow is laughing it up someplace thinking he stole my computer. He didn't!  I restored the operating system to prior to their access, I am good to go, and have subsequently successfully updated the initial software I was trying to do. Beware on the interwebs: Just cause it looks like a rose,  it might smell like shit.