Please help- question about legallity

Hi,
before 3 years IBM had on public ftp server IBM PC DOS 2000 which anyone could download.When you tried to install it, license agreement is the same as in commercial version. I sent email to IBM USA to ask about legal status of that system.They said to me to ask IBM China or IBM Europe.IBM China didn't response,IBM Europe sent me to ask IBM office there,and they sent me to ask IBM office there and in circle,never end,no answer.After one month IBM deleted PC DOS 2000 from server.
What you can say about legal status of PC DOS 2000 from their server? Is that mistake, or backup copy? Or that was backup copy? When producer offered something for free download as IBM in this case,without notice if that backup or upgrade,that is freeware as soon as I know.

 

What does EULA say? Does it need activation or registration? Can it still be bought from IBM?

 

No activation,no registration.System is discontinued by IBM in early 2000s

 

What does the licence agreement say? Do you have to buy it to have right to use it? OTOH they don't sell and develop that software any more and you get no response from them. I doubt that they will get into legal action if you use it.