It is hard to understand from an outsider, and it took me a lot of training to understand what is going on.
More people should try to understand....
So, yes, that is long ago, but Windows 2000 implies at least the year 2000.
Linux didn't complain at all.... Yes, I was running Linux back then in dual boot.
You're right, it's not correct in English, but you might see that the error is understandable if you're not a native English speaker. I'm not and funnily enough, I am from Luxembourg.