Bot(en) is a computerterm. My computerknowledge is just awful so I won´t try to explain it.
Anyway the word bot sounds like the swedish word båt which means boat or ship. This means that especially children thinks the song is about a ship. Anna of course is a name. Since I hate the song (sorry) I´m not totally aware of the lyrics but he uses terms that can be used both about computers and ships. But in the end it seems to be about a girl. Difficult to understand? Well it´s just a "stupid" text that goes well with the music. It´s not an importat message or anything like that.
I´ll say one thing. Once you´ve heard it, it´s hard to get it out of your head.
Want to know more? Just google Boot, booting or just "Boten Anna". I wasn´t allowed to post links just yet.
Don´t know if this helps you at all. But better to try and fail and not to try at all, eh?