Ok I made a new user on my computer (windows xp) and I installed Graal. All is well then I open Graal still fine then I go to the server list all the servers load im happy... but as soon as I click to join a server my computer restarts. So im like hummph I guess I will make levels I open Graal all is well then I go to tutorial and my computer restarts. Is only on this user and I tried re-installing and making the user again and it still happens.
Ok, I had a problem like this a while back when i first got Windows XP.
Here is what you need to check. Before you load the serverlist and all that, go into your audio options and turn all the volumes to 0. Log on to a server, if it works fine, turn all the volumes back up a little. If this restarts your computer, chances are your problem is bass.dll I found that the absolute newest version of bass.dll caused this problem for me. When I installed a slightly older version of it, it worked fine.
Here is the version of bass.dll that works for me. Use it to overwrite your copy of bass.dll. It will either be in your graal folder or in your system folder.