Guild Wars 2

I recently upgraded to Windows 7 64 Bit Version, and when I was installing GW2 again I got a message about 10,100KB into the installation asking for permission for GW2 to make changes, so I clicked “yes” and then the game shut down without any warning. I have tried several times and same thing happens, any one know why this is happening?

Rightclick on the .exe set it to run as admin. SHould fix this for you.