What is the best video converter to use?

Windows Movie Maker doesn't let me put videos from my digi cam because it's in the wrong format so what converter can I use?
I want one that's pretty decent quality, doesn't cost anything, doesn't stick the logo on my videos and it converts all of the video, not just half of it.
I used to have prism something but then my trial run ran out so yeah, I can't use that >.<
And zamzar has a limit of 100MB :l

Help please?

I don't think this is the right forum for such queries. You should ask them in OS or Software related forums

Yes, I dnt understand why people post threads in wrong section?

Nor do I understand that but I think we should respect that them because they at times may not have the complete picture about this forum