[Solved] IRC says that my username is already used

I can't log into any chat with my username. It says that my username is already used. My username is Aokishi and I am not registered. I cannot use my username due to this problem.

Looks like a client is connected on that username. If you don't register your nick it opens it up to someone being able to abuse this and use it themselves.

I don't think that someone is using my username because my computer crashed and just after the restart when I tried to access to the webchat it says that my username was already used.

It seems to be disconnected now. I'd recommend registering it.

I can't load the webchat page but my internet is perfectly working

Hmmm, it does indeed seem to be broken.

I suggest installing an actual IRC client. You can follow the instructions in Part 2 here:

irchighway.net/help/i-m-new-to-irc