Question: I think utorrent has been consuming lots of bandwidth and my connection is not that fast.
How do I set it so that it consumes the less possible bandwidth?
I've tried setting its download and upload limit to 1kbps. Together with the download bandwidth allocation set to low. I even exited utorrent but it seems that it is still consuming lots of bandwidth. How do I solve this one?

Answer: 
Try to limit the number of max connections. A lot of routers/modems have a limited number of connections they support (Windows does too by the way).

uTorrent can make lots and lots of connections, resulting in a slow network no matter if you actually download/upload at all.
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> I've tried setting its download and upload limit to 1kbps.
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> 

I believe that affects only the actual torrent data exchange.
You might also want to turn off DHT.