help needed at starting the game

I have some problems.. the problems started today

I can start up guildwars, log in...

But if i want to choose my character

my computer just switch off and goes on again

What do i ahve to do

We will need more information if we are to help you.

you will need to provide us with your computer specs, which include cpu, ram, graphics card/chip operating system etc

It sounds like a hardware issue, frankly. Either memory or hard drive.

If you check out your event log (I assume you're on XP), it should indicate what the problem is.

Go to the control panel/administrative tools/event log and look under application and system logs.

Jeremy