Guild Wars 2

Whenever I log-in to Guild Wars 2, my computer automatically restarts. But it’s fine whenever I’m doing anything else.

Well lets get some computer specifications and see what we can’t figure out.

You should also make sure your GPU and CPU are not overheating, if you don’t already have software that monitors your CPU and GPU, then I recommend getting HWMonitor which can be found here:
http://www.cpuid.com/downloads/hwmonitor/1.23-setup.exe